Abstract

By using a few-layered tungsten disulfide (WS2) nanosheet based saturable absorber (SA) prepared with the ultrasonic assisted vertical evaporation method, a diode-pumped singly Q-switched laser is demonstrated. At an incident pump power of 6.54 W, a maximum output power of 1.18 W with a minimum pulse duration of 53 ns is obtained from the singly WS2-SA Q-switched laser. To the best of our knowledge, this is the shortest pulse duration ever achieved from a diode-pumped solid-state passively Q-switched laser with a WS2-SA at 1.06 μm. Based on this, a sub-nanosecond KTiOPO4 (KTP) based intracavity optical parametric oscillation (IOPO) pumped by a hybrid Q-switched laser with a WS2-SA and an acousto-optic modulator (AOM) is realized. At an incident pump power of 10.2 W and an AOM repetition rate of 10 kHz, a maximum output power of 233 mW with a minimum pulse duration of 810 ps for signal wave is obtained. The experimental results indicate that the IOPO pumped by the hybrid Q-switched laser with an AOM and a WS2-SA can generate a signal wave with a shorter pulse duration and a higher peak power than that pumped by the Q-switched laser with an AOM and a graphene-SA or a molybdenum disulfide SA (MoS2-SA).

© 2017 Optical Society of America

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References

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2017 (2)

W. J. Tang, Y. G. Wang, K. J. Yang, J. Zhao, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, and W. C. Qiao, “1.36 W passively Q-switched YVO4/Nd:YVO4 laser with a WS2 saturable absorber,” IEEE Photonics Technol. Lett. 29(5), 470–473 (2017).

J. Qiao, S. Zhao, K. Yang, J. Zhao, G. Li, D. Li, T. Li, and W. Qiao, “Hybrid Q-switched laser with MoS2 saturable absorber and AOM driven sub-nanosecond KTP-OPO,” Opt. Express 25(4), 4227–4238 (2017).
[PubMed]

2016 (8)

M. Wang, K. Zhong, J. Mei, S. Guo, D. Xu, and J. Yao, “Simultaneous dual-wavelength eye-safe KTP OPO intracavity pumped by a Nd:GYSGG laser,” J. Phys. D Appl. Phys. 49, 065101 (2016).

Y. Huang, H. Cho, K. Su, and Y. Chen, “Dual-wavelength intracavity OPO with a diffusion-bonded Nd:YVO4/Nd:GdVO4 crystal,” IEEE Photonics Technol. Lett. 28, 1123 (2016).

R. C. T. Howe, R. I. Woodward, G. Hu, Z. Yang, E. J. R. Kelleher, and T. Hasan, “Surfactant-aided exfoliation of molybdenum disulfide for ultrafast pulse generation through edge-state saturable absorption,” xs Solidi. B 253(5), 911–917 (2016).

M. Trushin, E. J. R. Kelleher, and T. Hasan, “Theory of edge-state optical absorption in two-dimensional transition metal dichalcogenide flakes,” Phys. Rev. B 94, 155301 (2016).

H. Lin, X. Huang, X. Liu, D. Sun, W. Zhu, and Y. Xu, “Passively Q-switched c-cut Nd:YVO4 laser using graphene-oxide as a saturable absorber,” Optik (Stuttg.) 127(10), 4545–4546 (2016).

Y. J. Cheng, J. Peng, B. Xu, H. Yang, Z. Q. Luo, H. Y. Xu, Z. P. Cai, and J. Weng, “Passive Q-switching of a diode-pumped Pr:LiYF4 visible laser using WS2 as saturable absorber,” IEEE Photonics J. 8(3), 1501606 (2016).

C. Luan, K. Yang, J. Zhao, S. Zhao, L. Song, T. Li, H. Chu, J. Qiao, C. Wang, Z. Li, S. Jiang, B. Man, and L. Zheng, “WS2 as a saturable absorber for Q-switched 2 micron lasers,” Opt. Lett. 41(16), 3783–3786 (2016).
[PubMed]

C. Cheng, H. Liu, Y. Tan, J. R. Vázquez de Aldana, and F. Chen, “Passively Q-switched waveguide lasers based on two-dimensional transition metal diselenide,” Opt. Express 24(10), 10385–10390 (2016).
[PubMed]

2015 (12)

W. Cai, S. Jiang, S. Xu, Y. Li, J. Liu, C. Li, L. Zheng, L. Su, and J. Xu, “Graphene saturable absorber for diode pumped Yb:Sc2SiO5 mode-locked laser,” Opt. Laser Technol. 65, 1–4 (2015).

G. Sobon, “Mode-locking of fiber lasers using novel two-dimensional nanomaterials: graphene and topological insulators,” Photon. Res. 3(2), A56–A63 (2015).

F. J. Jia, H. Chen, P. Liu, Y. Z. Huang, and Z. Q. Luo, “Nanosecond-pulse, dual-wavelength passively Q-switched c-cut Nd:YVO4 laser using a few-layer Bi2Se3 saturable absorber,” IEEE J. Sel. Top. Quantum Electron. 21(1), 1601806 (2015).

D. Mao, S. Zhang, Y. Wang, X. Gan, W. Zhang, T. Mei, Y. Wang, Y. Wang, H. Zeng, and J. Zhao, “WS2 saturable absorber for dissipative soliton mode locking at 1.06 and 1.55 µm,” Opt. Express 23(21), 27509–27519 (2015).
[PubMed]

S. H. Kassani, R. Khazaeinezhad, H. Jeong, T. Nazari, D. Yeom, and K. Oh, “All-fiber Er-doped Q-switched laser based on tungsten disulfide saturable absorber,” Opt. Express 5(2), 373–379 (2015).

A. P. Luo, M. Liu, X. D. Wang, Q. Y. Ning, W. C. Xu, and Z. C. Luo, “Few-layer MoS2-deposited microfiber as highly nonlinear photonic device for pulse shaping in a fiber laser,” Photon. Res. 3(2), A69–A78 (2015).

B. Chen, X. Zhang, K. Wu, H. Wang, J. Wang, and J. Chen, “Q-switched fiber laser based on transition metal dichalcogenides MoS2, MoSe2, WS2, and WSe2.,” Opt. Express 23(20), 26723–26737 (2015).
[PubMed]

H. Chu, J. Zhao, T. Li, S. Zhao, K. Yang, D. Li, G. Li, W. Qiao, Y. Sang, and H. Liu, “KTP OPO with signal wave at 1630 nm intracavity pumped by an efficient σ-polarized Nd,MgO:LiNbO3 laser,” Opt. Mater. Express 5(3), 684–689 (2015).

M. Zhang, G. Hu, G. Hu, R. C. T. Howe, L. Chen, Z. Zheng, and T. Hasan, “Yb- and Er-doped fiber laser Q-switched with an optically uniform, broadband WS2 saturable absorber,” Sci. Rep. 5, 17482 (2015).
[PubMed]

J. Guo, G. He, Z. Jiao, and B. Wang, “Efficient high-peak-power and high-repetition-rate eye-safe laser using an intracavity KTP OPO,” Laser Phys. 25, 035403 (2015).

J. P. Qiao, J. Zhao, K. J. Yang, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, W. C. Qiao, and H. W. Chu, “Intracavity KTP OPO pumped by a doubly Q-switched laser with AOM and a monolayer graphene saturable absorber,” Opt. Mater. 50, 234–237 (2015).

C. Kieleck, A. Berrou, B. Donelan, B. Cadier, T. Robin, and M. Eichhorn, “6.5 W ZnGeP2 OPO directly pumped by a Q-switched Tm3+-doped single-oscillator fiber laser,” Opt. Lett. 40(6), 1101–1104 (2015).
[PubMed]

2014 (1)

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
[PubMed]

2013 (11)

M. Chhowalla, H. S. Shin, G. Eda, L. J. Li, K. P. Loh, and H. Zhang, “The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets,” Nat. Chem. 5(4), 263–275 (2013).
[PubMed]

R. Wang, B. Ruzicka, N. Kumar, M. Bellus, H. Chiu, and H. Zhao, “Ultrafast and spatially resolved studies of charge carriers in atomically-thin molybdenum disulfide,” Phys. Rev. B 87, 161403 (2013).

M. Hoffmann, S. Schilt, and T. Südmeyer, “CEO stabilization of a femtosecond laser using a SESAM as fast opto-optical modulator,” Opt. Express 21(24), 30054–30064 (2013).
[PubMed]

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
[PubMed]

W. Zhao, Z. Ghorannevis, L. Chu, M. Toh, C. Kloc, P.-H. Tan, and G. Eda, “Evolution of electronic structure in atomically thin sheets of WS2 and WSe2.,” ACS Nano 7(1), 791–797 (2013).
[PubMed]

Y. Chen, J. Xi, D. O. Dumcenco, Z. Liu, K. Suenaga, D. Wang, Z. Shuai, Y. S. Huang, and L. Xie, “Tunable band gap photoluminescence from atomically thin transition-metal dichalcogenide alloys,” ACS Nano 7(5), 4610–4616 (2013).
[PubMed]

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

H. R. Gutiérrez, N. Perea-López, A. L. Elías, A. Berkdemir, B. Wang, R. Lv, F. López-Urías, V. H. Crespi, H. Terrones, and M. Terrones, “Extraordinary room-temperature photoluminescence in triangular WS2 monolayers,” Nano Lett. 13(8), 3447–3454 (2013).
[PubMed]

A. Berkdemir, H. R. Gutierrez, A. R. Botello-Mendez, N. P. López, A. L. Elías, C. I. Chia, B. Wang, V. H. Crespi, F. L. Urias, J. C. Charlier, H. Terrones, and M. Terrones, “Identification of individual and few layers of WS2 using Raman Spectroscopy,” Sci. Rep. 3, 1755 (2013).

H. Huang, D. Shen, J. He, H. Chen, and Y. Wang, “Nanosecond nonlinear Čerenkov conical beams generation by intracavity sum frequency mixing in KTiOAsO4 crystal,” Opt. Lett. 38(4), 576–578 (2013).
[PubMed]

N. Hendaoui, A. Peremans, P. G. Schunemann, K. T. Zawilski, and V. Petrov, “Synchronously pumped OPO for picoseond pulse generation in the mid-infrared near 6.45 µm using AgGaS2 and CdSiP2: a comparative study,” Laser Phys. 23, 085401 (2013).

2012 (3)

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

G. Xie, J. Ma, P. Lv, W. Gao, P. Yuan, L. Qian, H. Yu, H. Zhang, J. Wang, and D. Tang, “Graphene saturable absorber for Q-switching and mode locking at 2μm wavelength,” Opt. Mater. Express 2(6), 878–883 (2012).

J. Liu, Y. Wang, Z. Qu, and X. Fan, “2 μm passive Q-switched mode-locked Tm3+:YAP laser with single-walled carbon nanotube absorber,” Opt. Laser Technol. 44(4), 960–962 (2012).

2011 (1)

W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

2010 (3)

2009 (2)

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Y. L. Yan, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic-layer graphene as a saturable absorber for ultrafast pulsed lasers,” Adv. Funct. Mater. 19, 3077–3083 (2009).

M. Breusing, C. Ropers, and T. Elsaesser, “Ultrafast carrier dynamics in graphite,” Phys. Rev. Lett. 102(8), 086809 (2009).
[PubMed]

2008 (4)

J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science 320(5881), 1308 (2008).
[PubMed]

Y. T. Chang, Y. P. Huang, K. W. Su, and Y. F. Chen, “Diode-pumped multi-frequency Q-switched laser with intracavity cascade Raman emission,” Opt. Express 16(11), 8286–8291 (2008).
[PubMed]

W. Y. Cheng, S. Z. Zhao, Z. Zhuo, X. M. Zhang, and Y. Wang, “Laser-diode side-pumped actively Q-switched eye-safe intracavity optical parametric oscillator,” Opt. Lasers Eng. 46(1), 12–17 (2008).

2007 (3)

A. Dergachev, D. Armstrong, A. Smith, T. Drake, and M. Dubois, “3.4-mum ZGP RISTRA nanosecond optical parametric oscillator pumped by a 2.05-µm Ho:YLF MOPA system,” Opt. Express 15(22), 14404–14413 (2007).
[PubMed]

F. Hajiesmaeilbaigi, H. Razzaghi, M. Mahdizadeh, and M. R. A. Moghaddam, “High-average-power diode-side-pumped double Q-switched Nd:YAG laser,” Laser Phys. Lett. 4(4), 261–264 (2007).

J. Wang, S. Z. Zhao, G. Q. Li, K. J. Yang, D. C. Li, J. An, and M. Li, “Pulse compression in laser-diode-pumped doubly Q-switched intracavity optical parametric oscillator considering Gaussian distribution of intracavity photon densities,” Jpn. J. Appl. Phys. 46(4), 1505–1510 (2007).

2005 (2)

T. Schibli, K. Minoshima, H. Kataura, E. Itoga, N. Minami, S. Kazaoui, K. Miyashita, M. Tokumoto, and Y. Sakakibara, “Ultrashort pulse-generation by saturable absorber mirrors based on polymer-embedded carbon nanotubes,” Opt. Express 13(20), 8025–8031 (2005).
[PubMed]

A. Rutz, R. Grange, V. Liverini, M. Haiml, S. Schon, and U. Keller, “1.5 μm GaInNAs semiconductor saturable absorber for passively modelocked solid-state lasers,” Electron. Lett. 41, 321–323 (2005).

2004 (3)

Y. F. Chen, S. W. Chen, L. Y. Tsai, Y. C. Chen, and C. H. Chien, “Efficient sub-nanosecond intracavity optical parametric oscillator pumped with a passively Q-switched Nd:GdVO4 laser,” Appl. Phys. B 79(7), 823–825 (2004).

P. Datta, S. Mukhopadhyay, S. Das, L. Tartara, A. Agnesi, and V. Degiorgio, “Enhancement of stability and efficiency of a nonlinear mirror mode-locked Nd:YVO4 oscillator by an active Q-switch,” Opt. Express 12(17), 4041–4046 (2004).
[PubMed]

Z. Li, Z. Xiong, N. Moore, G. Lim, W. Huang, and D. Huang, “Pulse width reduction in AO Q-switched diode-pumped Nd:YVO4 laser with GaAs coupler,” Opt. Commun. 237, 411 (2004).

2003 (1)

Y. F. Chen, S. W. Chen, S. W. Tsai, and Y. P. Lan, “High-repetition-rate eye-safe optical parametric oscillator intracavity pumped by a diode-pumped Q-switched Nd:YVO4 laser,” Appl. Phys. B 76(3), 263–266 (2003).

2001 (2)

R. F. Wu, K. S. Lai, H. Wong, W. J. Xie, Y. Lim, and E. Lau, “Multiwatt mid-IR output from a Nd:YALO laser pumped intracavity KTA OPO,” Opt. Express 8(13), 694–698 (2001).
[PubMed]

A. Klein, S. Tiefenbacher, V. Eyert, C. Pettenkofer, and W. Jaegermann, “Electronic band structure of single-crystal and single-layer WS2 influence of interlayer van der Waals interactions,” Phys. Rev. B 64(20), 205416 (2001).

2000 (1)

A. Levoshkin, A. Peirov, and J. E. Montage, “High efficiency diode pumped Q-switched Yb:Er:glass laser,” Opt. Commun. 185(4–6), 399–405 (2000).

1999 (1)

H. Kataura, Y. Kumazawaa, Y. Maniwaa, I. Umezub, S. Suzukic, Y. Ohtsukac, and Y. Achibac, “Optical properties of single-wall carbon nanotubes,” Synth. Met. 103, 2555–2558 (1999).

1995 (1)

Achibac, Y.

H. Kataura, Y. Kumazawaa, Y. Maniwaa, I. Umezub, S. Suzukic, Y. Ohtsukac, and Y. Achibac, “Optical properties of single-wall carbon nanotubes,” Synth. Met. 103, 2555–2558 (1999).

Agnesi, A.

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

P. Datta, S. Mukhopadhyay, S. Das, L. Tartara, A. Agnesi, and V. Degiorgio, “Enhancement of stability and efficiency of a nonlinear mirror mode-locked Nd:YVO4 oscillator by an active Q-switch,” Opt. Express 12(17), 4041–4046 (2004).
[PubMed]

An, J.

J. Wang, S. Z. Zhao, G. Q. Li, K. J. Yang, D. C. Li, J. An, and M. Li, “Pulse compression in laser-diode-pumped doubly Q-switched intracavity optical parametric oscillator considering Gaussian distribution of intracavity photon densities,” Jpn. J. Appl. Phys. 46(4), 1505–1510 (2007).

Armstrong, D.

Austin, W.

Bai, F.

W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

Bao, Q. L.

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Y. L. Yan, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic-layer graphene as a saturable absorber for ultrafast pulsed lasers,” Adv. Funct. Mater. 19, 3077–3083 (2009).

Belle, B. D.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

Bellus, M.

R. Wang, B. Ruzicka, N. Kumar, M. Bellus, H. Chiu, and H. Zhao, “Ultrafast and spatially resolved studies of charge carriers in atomically-thin molybdenum disulfide,” Phys. Rev. B 87, 161403 (2013).

Berkdemir, A.

H. R. Gutiérrez, N. Perea-López, A. L. Elías, A. Berkdemir, B. Wang, R. Lv, F. López-Urías, V. H. Crespi, H. Terrones, and M. Terrones, “Extraordinary room-temperature photoluminescence in triangular WS2 monolayers,” Nano Lett. 13(8), 3447–3454 (2013).
[PubMed]

A. Berkdemir, H. R. Gutierrez, A. R. Botello-Mendez, N. P. López, A. L. Elías, C. I. Chia, B. Wang, V. H. Crespi, F. L. Urias, J. C. Charlier, H. Terrones, and M. Terrones, “Identification of individual and few layers of WS2 using Raman Spectroscopy,” Sci. Rep. 3, 1755 (2013).

Berrou, A.

Bidault, O.

Blake, P.

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science 320(5881), 1308 (2008).
[PubMed]

Booth, T. J.

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science 320(5881), 1308 (2008).
[PubMed]

Botello-Mendez, A. R.

A. Berkdemir, H. R. Gutierrez, A. R. Botello-Mendez, N. P. López, A. L. Elías, C. I. Chia, B. Wang, V. H. Crespi, F. L. Urias, J. C. Charlier, H. Terrones, and M. Terrones, “Identification of individual and few layers of WS2 using Raman Spectroscopy,” Sci. Rep. 3, 1755 (2013).

Breusing, M.

M. Breusing, C. Ropers, and T. Elsaesser, “Ultrafast carrier dynamics in graphite,” Phys. Rev. Lett. 102(8), 086809 (2009).
[PubMed]

Britnell, L.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

Cadier, B.

Cai, W.

W. Cai, S. Jiang, S. Xu, Y. Li, J. Liu, C. Li, L. Zheng, L. Su, and J. Xu, “Graphene saturable absorber for diode pumped Yb:Sc2SiO5 mode-locked laser,” Opt. Laser Technol. 65, 1–4 (2015).

Cai, Z. P.

Y. J. Cheng, J. Peng, B. Xu, H. Yang, Z. Q. Luo, H. Y. Xu, Z. P. Cai, and J. Weng, “Passive Q-switching of a diode-pumped Pr:LiYF4 visible laser using WS2 as saturable absorber,” IEEE Photonics J. 8(3), 1501606 (2016).

Casiraghi, C.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

Castro Neto, A. H.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

Chandrashekhar, M.

J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).

Chang, N. W. H.

Chang, Y. T.

Charlier, J. C.

A. Berkdemir, H. R. Gutierrez, A. R. Botello-Mendez, N. P. López, A. L. Elías, C. I. Chia, B. Wang, V. H. Crespi, F. L. Urias, J. C. Charlier, H. Terrones, and M. Terrones, “Identification of individual and few layers of WS2 using Raman Spectroscopy,” Sci. Rep. 3, 1755 (2013).

Chen, B.

Chen, F.

Chen, H.

F. J. Jia, H. Chen, P. Liu, Y. Z. Huang, and Z. Q. Luo, “Nanosecond-pulse, dual-wavelength passively Q-switched c-cut Nd:YVO4 laser using a few-layer Bi2Se3 saturable absorber,” IEEE J. Sel. Top. Quantum Electron. 21(1), 1601806 (2015).

H. Huang, D. Shen, J. He, H. Chen, and Y. Wang, “Nanosecond nonlinear Čerenkov conical beams generation by intracavity sum frequency mixing in KTiOAsO4 crystal,” Opt. Lett. 38(4), 576–578 (2013).
[PubMed]

Chen, J.

Chen, L.

M. Zhang, G. Hu, G. Hu, R. C. T. Howe, L. Chen, Z. Zheng, and T. Hasan, “Yb- and Er-doped fiber laser Q-switched with an optically uniform, broadband WS2 saturable absorber,” Sci. Rep. 5, 17482 (2015).
[PubMed]

Chen, S. W.

Y. F. Chen, S. W. Chen, L. Y. Tsai, Y. C. Chen, and C. H. Chien, “Efficient sub-nanosecond intracavity optical parametric oscillator pumped with a passively Q-switched Nd:GdVO4 laser,” Appl. Phys. B 79(7), 823–825 (2004).

Y. F. Chen, S. W. Chen, S. W. Tsai, and Y. P. Lan, “High-repetition-rate eye-safe optical parametric oscillator intracavity pumped by a diode-pumped Q-switched Nd:YVO4 laser,” Appl. Phys. B 76(3), 263–266 (2003).

Chen, W. D.

Chen, X.

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
[PubMed]

Chen, Y.

Y. Huang, H. Cho, K. Su, and Y. Chen, “Dual-wavelength intracavity OPO with a diffusion-bonded Nd:YVO4/Nd:GdVO4 crystal,” IEEE Photonics Technol. Lett. 28, 1123 (2016).

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
[PubMed]

Y. Chen, J. Xi, D. O. Dumcenco, Z. Liu, K. Suenaga, D. Wang, Z. Shuai, Y. S. Huang, and L. Xie, “Tunable band gap photoluminescence from atomically thin transition-metal dichalcogenide alloys,” ACS Nano 7(5), 4610–4616 (2013).
[PubMed]

Chen, Y. C.

Y. F. Chen, S. W. Chen, L. Y. Tsai, Y. C. Chen, and C. H. Chien, “Efficient sub-nanosecond intracavity optical parametric oscillator pumped with a passively Q-switched Nd:GdVO4 laser,” Appl. Phys. B 79(7), 823–825 (2004).

Chen, Y. F.

Y. T. Chang, Y. P. Huang, K. W. Su, and Y. F. Chen, “Diode-pumped multi-frequency Q-switched laser with intracavity cascade Raman emission,” Opt. Express 16(11), 8286–8291 (2008).
[PubMed]

Y. F. Chen, S. W. Chen, L. Y. Tsai, Y. C. Chen, and C. H. Chien, “Efficient sub-nanosecond intracavity optical parametric oscillator pumped with a passively Q-switched Nd:GdVO4 laser,” Appl. Phys. B 79(7), 823–825 (2004).

Y. F. Chen, S. W. Chen, S. W. Tsai, and Y. P. Lan, “High-repetition-rate eye-safe optical parametric oscillator intracavity pumped by a diode-pumped Q-switched Nd:YVO4 laser,” Appl. Phys. B 76(3), 263–266 (2003).

Cheng, C.

Cheng, W. Y.

W. Y. Cheng, S. Z. Zhao, Z. Zhuo, X. M. Zhang, and Y. Wang, “Laser-diode side-pumped actively Q-switched eye-safe intracavity optical parametric oscillator,” Opt. Lasers Eng. 46(1), 12–17 (2008).

Cheng, Y. J.

Y. J. Cheng, J. Peng, B. Xu, H. Yang, Z. Q. Luo, H. Y. Xu, Z. P. Cai, and J. Weng, “Passive Q-switching of a diode-pumped Pr:LiYF4 visible laser using WS2 as saturable absorber,” IEEE Photonics J. 8(3), 1501606 (2016).

Chhowalla, M.

M. Chhowalla, H. S. Shin, G. Eda, L. J. Li, K. P. Loh, and H. Zhang, “The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets,” Nat. Chem. 5(4), 263–275 (2013).
[PubMed]

Chia, C. I.

A. Berkdemir, H. R. Gutierrez, A. R. Botello-Mendez, N. P. López, A. L. Elías, C. I. Chia, B. Wang, V. H. Crespi, F. L. Urias, J. C. Charlier, H. Terrones, and M. Terrones, “Identification of individual and few layers of WS2 using Raman Spectroscopy,” Sci. Rep. 3, 1755 (2013).

Chien, C. H.

Y. F. Chen, S. W. Chen, L. Y. Tsai, Y. C. Chen, and C. H. Chien, “Efficient sub-nanosecond intracavity optical parametric oscillator pumped with a passively Q-switched Nd:GdVO4 laser,” Appl. Phys. B 79(7), 823–825 (2004).

Chiu, H.

R. Wang, B. Ruzicka, N. Kumar, M. Bellus, H. Chiu, and H. Zhao, “Ultrafast and spatially resolved studies of charge carriers in atomically-thin molybdenum disulfide,” Phys. Rev. B 87, 161403 (2013).

Cho, H.

Y. Huang, H. Cho, K. Su, and Y. Chen, “Dual-wavelength intracavity OPO with a diffusion-bonded Nd:YVO4/Nd:GdVO4 crystal,” IEEE Photonics Technol. Lett. 28, 1123 (2016).

Chu, H.

Chu, H. W.

J. P. Qiao, J. Zhao, K. J. Yang, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, W. C. Qiao, and H. W. Chu, “Intracavity KTP OPO pumped by a doubly Q-switched laser with AOM and a monolayer graphene saturable absorber,” Opt. Mater. 50, 234–237 (2015).

Chu, L.

W. Zhao, Z. Ghorannevis, L. Chu, M. Toh, C. Kloc, P.-H. Tan, and G. Eda, “Evolution of electronic structure in atomically thin sheets of WS2 and WSe2.,” ACS Nano 7(1), 791–797 (2013).
[PubMed]

Crespi, V. H.

H. R. Gutiérrez, N. Perea-López, A. L. Elías, A. Berkdemir, B. Wang, R. Lv, F. López-Urías, V. H. Crespi, H. Terrones, and M. Terrones, “Extraordinary room-temperature photoluminescence in triangular WS2 monolayers,” Nano Lett. 13(8), 3447–3454 (2013).
[PubMed]

A. Berkdemir, H. R. Gutierrez, A. R. Botello-Mendez, N. P. López, A. L. Elías, C. I. Chia, B. Wang, V. H. Crespi, F. L. Urias, J. C. Charlier, H. Terrones, and M. Terrones, “Identification of individual and few layers of WS2 using Raman Spectroscopy,” Sci. Rep. 3, 1755 (2013).

Cui, X.

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
[PubMed]

Dai, J.

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
[PubMed]

Dallocchio, P.

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

Das, S.

Datta, P.

Dawlaty, J.

J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).

Degiorgio, V.

Dergachev, A.

Donelan, B.

Drake, T.

Dubois, M.

Dumcenco, D. O.

Y. Chen, J. Xi, D. O. Dumcenco, Z. Liu, K. Suenaga, D. Wang, Z. Shuai, Y. S. Huang, and L. Xie, “Tunable band gap photoluminescence from atomically thin transition-metal dichalcogenide alloys,” ACS Nano 7(5), 4610–4616 (2013).
[PubMed]

Eckmann, A.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

Eda, G.

W. Zhao, Z. Ghorannevis, L. Chu, M. Toh, C. Kloc, P.-H. Tan, and G. Eda, “Evolution of electronic structure in atomically thin sheets of WS2 and WSe2.,” ACS Nano 7(1), 791–797 (2013).
[PubMed]

M. Chhowalla, H. S. Shin, G. Eda, L. J. Li, K. P. Loh, and H. Zhang, “The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets,” Nat. Chem. 5(4), 263–275 (2013).
[PubMed]

Eichhorn, M.

Elías, A. L.

A. Berkdemir, H. R. Gutierrez, A. R. Botello-Mendez, N. P. López, A. L. Elías, C. I. Chia, B. Wang, V. H. Crespi, F. L. Urias, J. C. Charlier, H. Terrones, and M. Terrones, “Identification of individual and few layers of WS2 using Raman Spectroscopy,” Sci. Rep. 3, 1755 (2013).

H. R. Gutiérrez, N. Perea-López, A. L. Elías, A. Berkdemir, B. Wang, R. Lv, F. López-Urías, V. H. Crespi, H. Terrones, and M. Terrones, “Extraordinary room-temperature photoluminescence in triangular WS2 monolayers,” Nano Lett. 13(8), 3447–3454 (2013).
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M. Breusing, C. Ropers, and T. Elsaesser, “Ultrafast carrier dynamics in graphite,” Phys. Rev. Lett. 102(8), 086809 (2009).
[PubMed]

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A. Klein, S. Tiefenbacher, V. Eyert, C. Pettenkofer, and W. Jaegermann, “Electronic band structure of single-crystal and single-layer WS2 influence of interlayer van der Waals interactions,” Phys. Rev. B 64(20), 205416 (2001).

Fan, X.

J. Liu, Y. Wang, Z. Qu, and X. Fan, “2 μm passive Q-switched mode-locked Tm3+:YAP laser with single-walled carbon nanotube absorber,” Opt. Laser Technol. 44(4), 960–962 (2012).

Gan, X.

Gao, W.

Geim, A. K.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science 320(5881), 1308 (2008).
[PubMed]

Georgiou, T.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

Ghorannevis, Z.

W. Zhao, Z. Ghorannevis, L. Chu, M. Toh, C. Kloc, P.-H. Tan, and G. Eda, “Evolution of electronic structure in atomically thin sheets of WS2 and WSe2.,” ACS Nano 7(1), 791–797 (2013).
[PubMed]

Gorbachev, R. V.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

Grange, R.

A. Rutz, R. Grange, V. Liverini, M. Haiml, S. Schon, and U. Keller, “1.5 μm GaInNAs semiconductor saturable absorber for passively modelocked solid-state lasers,” Electron. Lett. 41, 321–323 (2005).

Grigorenko, A. N.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science 320(5881), 1308 (2008).
[PubMed]

Guo, J.

J. Guo, G. He, Z. Jiao, and B. Wang, “Efficient high-peak-power and high-repetition-rate eye-safe laser using an intracavity KTP OPO,” Laser Phys. 25, 035403 (2015).

Guo, S.

M. Wang, K. Zhong, J. Mei, S. Guo, D. Xu, and J. Yao, “Simultaneous dual-wavelength eye-safe KTP OPO intracavity pumped by a Nd:GYSGG laser,” J. Phys. D Appl. Phys. 49, 065101 (2016).

Gutierrez, H. R.

A. Berkdemir, H. R. Gutierrez, A. R. Botello-Mendez, N. P. López, A. L. Elías, C. I. Chia, B. Wang, V. H. Crespi, F. L. Urias, J. C. Charlier, H. Terrones, and M. Terrones, “Identification of individual and few layers of WS2 using Raman Spectroscopy,” Sci. Rep. 3, 1755 (2013).

Gutiérrez, H. R.

H. R. Gutiérrez, N. Perea-López, A. L. Elías, A. Berkdemir, B. Wang, R. Lv, F. López-Urías, V. H. Crespi, H. Terrones, and M. Terrones, “Extraordinary room-temperature photoluminescence in triangular WS2 monolayers,” Nano Lett. 13(8), 3447–3454 (2013).
[PubMed]

Haiml, M.

A. Rutz, R. Grange, V. Liverini, M. Haiml, S. Schon, and U. Keller, “1.5 μm GaInNAs semiconductor saturable absorber for passively modelocked solid-state lasers,” Electron. Lett. 41, 321–323 (2005).

Hajiesmaeilbaigi, F.

F. Hajiesmaeilbaigi, H. Razzaghi, M. Mahdizadeh, and M. R. A. Moghaddam, “High-average-power diode-side-pumped double Q-switched Nd:YAG laser,” Laser Phys. Lett. 4(4), 261–264 (2007).

Hasan, T.

M. Trushin, E. J. R. Kelleher, and T. Hasan, “Theory of edge-state optical absorption in two-dimensional transition metal dichalcogenide flakes,” Phys. Rev. B 94, 155301 (2016).

R. C. T. Howe, R. I. Woodward, G. Hu, Z. Yang, E. J. R. Kelleher, and T. Hasan, “Surfactant-aided exfoliation of molybdenum disulfide for ultrafast pulse generation through edge-state saturable absorption,” xs Solidi. B 253(5), 911–917 (2016).

M. Zhang, G. Hu, G. Hu, R. C. T. Howe, L. Chen, Z. Zheng, and T. Hasan, “Yb- and Er-doped fiber laser Q-switched with an optically uniform, broadband WS2 saturable absorber,” Sci. Rep. 5, 17482 (2015).
[PubMed]

He, G.

J. Guo, G. He, Z. Jiao, and B. Wang, “Efficient high-peak-power and high-repetition-rate eye-safe laser using an intracavity KTP OPO,” Laser Phys. 25, 035403 (2015).

He, J.

He, R.

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
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Hendaoui, N.

N. Hendaoui, A. Peremans, P. G. Schunemann, K. T. Zawilski, and V. Petrov, “Synchronously pumped OPO for picoseond pulse generation in the mid-infrared near 6.45 µm using AgGaS2 and CdSiP2: a comparative study,” Laser Phys. 23, 085401 (2013).

Hoffmann, M.

Hosken, D. J.

Howe, R. C. T.

R. C. T. Howe, R. I. Woodward, G. Hu, Z. Yang, E. J. R. Kelleher, and T. Hasan, “Surfactant-aided exfoliation of molybdenum disulfide for ultrafast pulse generation through edge-state saturable absorption,” xs Solidi. B 253(5), 911–917 (2016).

M. Zhang, G. Hu, G. Hu, R. C. T. Howe, L. Chen, Z. Zheng, and T. Hasan, “Yb- and Er-doped fiber laser Q-switched with an optically uniform, broadband WS2 saturable absorber,” Sci. Rep. 5, 17482 (2015).
[PubMed]

Hu, G.

R. C. T. Howe, R. I. Woodward, G. Hu, Z. Yang, E. J. R. Kelleher, and T. Hasan, “Surfactant-aided exfoliation of molybdenum disulfide for ultrafast pulse generation through edge-state saturable absorption,” xs Solidi. B 253(5), 911–917 (2016).

M. Zhang, G. Hu, G. Hu, R. C. T. Howe, L. Chen, Z. Zheng, and T. Hasan, “Yb- and Er-doped fiber laser Q-switched with an optically uniform, broadband WS2 saturable absorber,” Sci. Rep. 5, 17482 (2015).
[PubMed]

M. Zhang, G. Hu, G. Hu, R. C. T. Howe, L. Chen, Z. Zheng, and T. Hasan, “Yb- and Er-doped fiber laser Q-switched with an optically uniform, broadband WS2 saturable absorber,” Sci. Rep. 5, 17482 (2015).
[PubMed]

Huang, D.

Z. Li, Z. Xiong, N. Moore, G. Lim, W. Huang, and D. Huang, “Pulse width reduction in AO Q-switched diode-pumped Nd:YVO4 laser with GaAs coupler,” Opt. Commun. 237, 411 (2004).

Huang, H.

Huang, W.

Z. Li, Z. Xiong, N. Moore, G. Lim, W. Huang, and D. Huang, “Pulse width reduction in AO Q-switched diode-pumped Nd:YVO4 laser with GaAs coupler,” Opt. Commun. 237, 411 (2004).

Huang, X.

H. Lin, X. Huang, X. Liu, D. Sun, W. Zhu, and Y. Xu, “Passively Q-switched c-cut Nd:YVO4 laser using graphene-oxide as a saturable absorber,” Optik (Stuttg.) 127(10), 4545–4546 (2016).

Huang, Y.

Y. Huang, H. Cho, K. Su, and Y. Chen, “Dual-wavelength intracavity OPO with a diffusion-bonded Nd:YVO4/Nd:GdVO4 crystal,” IEEE Photonics Technol. Lett. 28, 1123 (2016).

Huang, Y. P.

Huang, Y. S.

Y. Chen, J. Xi, D. O. Dumcenco, Z. Liu, K. Suenaga, D. Wang, Z. Shuai, Y. S. Huang, and L. Xie, “Tunable band gap photoluminescence from atomically thin transition-metal dichalcogenide alloys,” ACS Nano 7(5), 4610–4616 (2013).
[PubMed]

Huang, Y. Z.

F. J. Jia, H. Chen, P. Liu, Y. Z. Huang, and Z. Q. Luo, “Nanosecond-pulse, dual-wavelength passively Q-switched c-cut Nd:YVO4 laser using a few-layer Bi2Se3 saturable absorber,” IEEE J. Sel. Top. Quantum Electron. 21(1), 1601806 (2015).

Isaenko, L.

Itoga, E.

Jaegermann, W.

A. Klein, S. Tiefenbacher, V. Eyert, C. Pettenkofer, and W. Jaegermann, “Electronic band structure of single-crystal and single-layer WS2 influence of interlayer van der Waals interactions,” Phys. Rev. B 64(20), 205416 (2001).

Jalil, R.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

Jeong, H.

S. H. Kassani, R. Khazaeinezhad, H. Jeong, T. Nazari, D. Yeom, and K. Oh, “All-fiber Er-doped Q-switched laser based on tungsten disulfide saturable absorber,” Opt. Express 5(2), 373–379 (2015).

Jia, F. J.

F. J. Jia, H. Chen, P. Liu, Y. Z. Huang, and Z. Q. Luo, “Nanosecond-pulse, dual-wavelength passively Q-switched c-cut Nd:YVO4 laser using a few-layer Bi2Se3 saturable absorber,” IEEE J. Sel. Top. Quantum Electron. 21(1), 1601806 (2015).

Jiang, S.

C. Luan, K. Yang, J. Zhao, S. Zhao, L. Song, T. Li, H. Chu, J. Qiao, C. Wang, Z. Li, S. Jiang, B. Man, and L. Zheng, “WS2 as a saturable absorber for Q-switched 2 micron lasers,” Opt. Lett. 41(16), 3783–3786 (2016).
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W. Cai, S. Jiang, S. Xu, Y. Li, J. Liu, C. Li, L. Zheng, L. Su, and J. Xu, “Graphene saturable absorber for diode pumped Yb:Sc2SiO5 mode-locked laser,” Opt. Laser Technol. 65, 1–4 (2015).

Jiao, Z.

J. Guo, G. He, Z. Jiao, and B. Wang, “Efficient high-peak-power and high-repetition-rate eye-safe laser using an intracavity KTP OPO,” Laser Phys. 25, 035403 (2015).

Jin, G. F.

W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

Kannari, F.

N. Takei, S. Suzuki, and F. Kannari, “Compensation of thermal lensing in an eye-safe cascade Raman laser with Ba(NO3)2 crystal,” in Conference on Lasers and Electro-Optics, Pacific Rim, 99(3), 744–755 (1999).

Kassani, S. H.

S. H. Kassani, R. Khazaeinezhad, H. Jeong, T. Nazari, D. Yeom, and K. Oh, “All-fiber Er-doped Q-switched laser based on tungsten disulfide saturable absorber,” Opt. Express 5(2), 373–379 (2015).

Kataura, H.

T. Schibli, K. Minoshima, H. Kataura, E. Itoga, N. Minami, S. Kazaoui, K. Miyashita, M. Tokumoto, and Y. Sakakibara, “Ultrashort pulse-generation by saturable absorber mirrors based on polymer-embedded carbon nanotubes,” Opt. Express 13(20), 8025–8031 (2005).
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H. Kataura, Y. Kumazawaa, Y. Maniwaa, I. Umezub, S. Suzukic, Y. Ohtsukac, and Y. Achibac, “Optical properties of single-wall carbon nanotubes,” Synth. Met. 103, 2555–2558 (1999).

Kazaoui, S.

Kelleher, E. J. R.

R. C. T. Howe, R. I. Woodward, G. Hu, Z. Yang, E. J. R. Kelleher, and T. Hasan, “Surfactant-aided exfoliation of molybdenum disulfide for ultrafast pulse generation through edge-state saturable absorption,” xs Solidi. B 253(5), 911–917 (2016).

M. Trushin, E. J. R. Kelleher, and T. Hasan, “Theory of edge-state optical absorption in two-dimensional transition metal dichalcogenide flakes,” Phys. Rev. B 94, 155301 (2016).

Keller, U.

A. Rutz, R. Grange, V. Liverini, M. Haiml, S. Schon, and U. Keller, “1.5 μm GaInNAs semiconductor saturable absorber for passively modelocked solid-state lasers,” Electron. Lett. 41, 321–323 (2005).

Khazaeinezhad, R.

S. H. Kassani, R. Khazaeinezhad, H. Jeong, T. Nazari, D. Yeom, and K. Oh, “All-fiber Er-doped Q-switched laser based on tungsten disulfide saturable absorber,” Opt. Express 5(2), 373–379 (2015).

Kieleck, C.

Kim, Y. J.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
[PubMed]

Klein, A.

A. Klein, S. Tiefenbacher, V. Eyert, C. Pettenkofer, and W. Jaegermann, “Electronic band structure of single-crystal and single-layer WS2 influence of interlayer van der Waals interactions,” Phys. Rev. B 64(20), 205416 (2001).

Kloc, C.

W. Zhao, Z. Ghorannevis, L. Chu, M. Toh, C. Kloc, P.-H. Tan, and G. Eda, “Evolution of electronic structure in atomically thin sheets of WS2 and WSe2.,” ACS Nano 7(1), 791–797 (2013).
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Kolker, D.

Kumar, N.

R. Wang, B. Ruzicka, N. Kumar, M. Bellus, H. Chiu, and H. Zhao, “Ultrafast and spatially resolved studies of charge carriers in atomically-thin molybdenum disulfide,” Phys. Rev. B 87, 161403 (2013).

Kumazawaa, Y.

H. Kataura, Y. Kumazawaa, Y. Maniwaa, I. Umezub, S. Suzukic, Y. Ohtsukac, and Y. Achibac, “Optical properties of single-wall carbon nanotubes,” Synth. Met. 103, 2555–2558 (1999).

Lai, K. S.

Lan, Y. P.

Y. F. Chen, S. W. Chen, S. W. Tsai, and Y. P. Lan, “High-repetition-rate eye-safe optical parametric oscillator intracavity pumped by a diode-pumped Q-switched Nd:YVO4 laser,” Appl. Phys. B 76(3), 263–266 (2003).

Lau, E.

Laurell, F.

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

Levoshkin, A.

A. Levoshkin, A. Peirov, and J. E. Montage, “High efficiency diode pumped Q-switched Yb:Er:glass laser,” Opt. Commun. 185(4–6), 399–405 (2000).

Li, C.

W. Cai, S. Jiang, S. Xu, Y. Li, J. Liu, C. Li, L. Zheng, L. Su, and J. Xu, “Graphene saturable absorber for diode pumped Yb:Sc2SiO5 mode-locked laser,” Opt. Laser Technol. 65, 1–4 (2015).

Li, D.

Li, D. C.

W. J. Tang, Y. G. Wang, K. J. Yang, J. Zhao, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, and W. C. Qiao, “1.36 W passively Q-switched YVO4/Nd:YVO4 laser with a WS2 saturable absorber,” IEEE Photonics Technol. Lett. 29(5), 470–473 (2017).

J. P. Qiao, J. Zhao, K. J. Yang, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, W. C. Qiao, and H. W. Chu, “Intracavity KTP OPO pumped by a doubly Q-switched laser with AOM and a monolayer graphene saturable absorber,” Opt. Mater. 50, 234–237 (2015).

J. Wang, S. Z. Zhao, G. Q. Li, K. J. Yang, D. C. Li, J. An, and M. Li, “Pulse compression in laser-diode-pumped doubly Q-switched intracavity optical parametric oscillator considering Gaussian distribution of intracavity photon densities,” Jpn. J. Appl. Phys. 46(4), 1505–1510 (2007).

Li, G.

Li, G. Q.

W. J. Tang, Y. G. Wang, K. J. Yang, J. Zhao, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, and W. C. Qiao, “1.36 W passively Q-switched YVO4/Nd:YVO4 laser with a WS2 saturable absorber,” IEEE Photonics Technol. Lett. 29(5), 470–473 (2017).

J. P. Qiao, J. Zhao, K. J. Yang, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, W. C. Qiao, and H. W. Chu, “Intracavity KTP OPO pumped by a doubly Q-switched laser with AOM and a monolayer graphene saturable absorber,” Opt. Mater. 50, 234–237 (2015).

J. Wang, S. Z. Zhao, G. Q. Li, K. J. Yang, D. C. Li, J. An, and M. Li, “Pulse compression in laser-diode-pumped doubly Q-switched intracavity optical parametric oscillator considering Gaussian distribution of intracavity photon densities,” Jpn. J. Appl. Phys. 46(4), 1505–1510 (2007).

Li, L. J.

M. Chhowalla, H. S. Shin, G. Eda, L. J. Li, K. P. Loh, and H. Zhang, “The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets,” Nat. Chem. 5(4), 263–275 (2013).
[PubMed]

Li, M.

J. Wang, S. Z. Zhao, G. Q. Li, K. J. Yang, D. C. Li, J. An, and M. Li, “Pulse compression in laser-diode-pumped doubly Q-switched intracavity optical parametric oscillator considering Gaussian distribution of intracavity photon densities,” Jpn. J. Appl. Phys. 46(4), 1505–1510 (2007).

Li, T.

Li, Y.

W. Cai, S. Jiang, S. Xu, Y. Li, J. Liu, C. Li, L. Zheng, L. Su, and J. Xu, “Graphene saturable absorber for diode pumped Yb:Sc2SiO5 mode-locked laser,” Opt. Laser Technol. 65, 1–4 (2015).

Li, Z.

C. Luan, K. Yang, J. Zhao, S. Zhao, L. Song, T. Li, H. Chu, J. Qiao, C. Wang, Z. Li, S. Jiang, B. Man, and L. Zheng, “WS2 as a saturable absorber for Q-switched 2 micron lasers,” Opt. Lett. 41(16), 3783–3786 (2016).
[PubMed]

Z. Li, Z. Xiong, N. Moore, G. Lim, W. Huang, and D. Huang, “Pulse width reduction in AO Q-switched diode-pumped Nd:YVO4 laser with GaAs coupler,” Opt. Commun. 237, 411 (2004).

Lim, G.

Z. Li, Z. Xiong, N. Moore, G. Lim, W. Huang, and D. Huang, “Pulse width reduction in AO Q-switched diode-pumped Nd:YVO4 laser with GaAs coupler,” Opt. Commun. 237, 411 (2004).

Lim, Y.

Lin, H.

H. Lin, X. Huang, X. Liu, D. Sun, W. Zhu, and Y. Xu, “Passively Q-switched c-cut Nd:YVO4 laser using graphene-oxide as a saturable absorber,” Optik (Stuttg.) 127(10), 4545–4546 (2016).

Liu, G.-B.

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
[PubMed]

Liu, H.

Liu, J.

W. Cai, S. Jiang, S. Xu, Y. Li, J. Liu, C. Li, L. Zheng, L. Su, and J. Xu, “Graphene saturable absorber for diode pumped Yb:Sc2SiO5 mode-locked laser,” Opt. Laser Technol. 65, 1–4 (2015).

J. Liu, Y. Wang, Z. Qu, and X. Fan, “2 μm passive Q-switched mode-locked Tm3+:YAP laser with single-walled carbon nanotube absorber,” Opt. Laser Technol. 44(4), 960–962 (2012).

Liu, M.

Liu, P.

F. J. Jia, H. Chen, P. Liu, Y. Z. Huang, and Z. Q. Luo, “Nanosecond-pulse, dual-wavelength passively Q-switched c-cut Nd:YVO4 laser using a few-layer Bi2Se3 saturable absorber,” IEEE J. Sel. Top. Quantum Electron. 21(1), 1601806 (2015).

Liu, X.

H. Lin, X. Huang, X. Liu, D. Sun, W. Zhu, and Y. Xu, “Passively Q-switched c-cut Nd:YVO4 laser using graphene-oxide as a saturable absorber,” Optik (Stuttg.) 127(10), 4545–4546 (2016).

Liu, Z.

Y. Chen, J. Xi, D. O. Dumcenco, Z. Liu, K. Suenaga, D. Wang, Z. Shuai, Y. S. Huang, and L. Xie, “Tunable band gap photoluminescence from atomically thin transition-metal dichalcogenide alloys,” ACS Nano 7(5), 4610–4616 (2013).
[PubMed]

Liu, Z. J.

W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

Liverini, V.

A. Rutz, R. Grange, V. Liverini, M. Haiml, S. Schon, and U. Keller, “1.5 μm GaInNAs semiconductor saturable absorber for passively modelocked solid-state lasers,” Electron. Lett. 41, 321–323 (2005).

Lobanov, S.

Loh, K. P.

M. Chhowalla, H. S. Shin, G. Eda, L. J. Li, K. P. Loh, and H. Zhang, “The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets,” Nat. Chem. 5(4), 263–275 (2013).
[PubMed]

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Y. L. Yan, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic-layer graphene as a saturable absorber for ultrafast pulsed lasers,” Adv. Funct. Mater. 19, 3077–3083 (2009).

López, N. P.

A. Berkdemir, H. R. Gutierrez, A. R. Botello-Mendez, N. P. López, A. L. Elías, C. I. Chia, B. Wang, V. H. Crespi, F. L. Urias, J. C. Charlier, H. Terrones, and M. Terrones, “Identification of individual and few layers of WS2 using Raman Spectroscopy,” Sci. Rep. 3, 1755 (2013).

López-Urías, F.

H. R. Gutiérrez, N. Perea-López, A. L. Elías, A. Berkdemir, B. Wang, R. Lv, F. López-Urías, V. H. Crespi, H. Terrones, and M. Terrones, “Extraordinary room-temperature photoluminescence in triangular WS2 monolayers,” Nano Lett. 13(8), 3447–3454 (2013).
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Luo, A. P.

Luo, Z. C.

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Y. J. Cheng, J. Peng, B. Xu, H. Yang, Z. Q. Luo, H. Y. Xu, Z. P. Cai, and J. Weng, “Passive Q-switching of a diode-pumped Pr:LiYF4 visible laser using WS2 as saturable absorber,” IEEE Photonics J. 8(3), 1501606 (2016).

F. J. Jia, H. Chen, P. Liu, Y. Z. Huang, and Z. Q. Luo, “Nanosecond-pulse, dual-wavelength passively Q-switched c-cut Nd:YVO4 laser using a few-layer Bi2Se3 saturable absorber,” IEEE J. Sel. Top. Quantum Electron. 21(1), 1601806 (2015).

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Maniwaa, Y.

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Marchev, G.

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

V. Petrov, J. J. Zondy, O. Bidault, L. Isaenko, V. Vedenyapin, A. Yelisseyev, W. D. Chen, A. Tyazhev, S. Lobanov, G. Marchev, and D. Kolker, “Optical, thermal, electrical, damage, and phase-matching properties of lithium selenoindate,” J. Opt. Soc. Am. B 27(9), 1902–1927 (2010).

Mei, J.

M. Wang, K. Zhong, J. Mei, S. Guo, D. Xu, and J. Yao, “Simultaneous dual-wavelength eye-safe KTP OPO intracavity pumped by a Nd:GYSGG laser,” J. Phys. D Appl. Phys. 49, 065101 (2016).

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Moghaddam, M. R. A.

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A. Levoshkin, A. Peirov, and J. E. Montage, “High efficiency diode pumped Q-switched Yb:Er:glass laser,” Opt. Commun. 185(4–6), 399–405 (2000).

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Z. Li, Z. Xiong, N. Moore, G. Lim, W. Huang, and D. Huang, “Pulse width reduction in AO Q-switched diode-pumped Nd:YVO4 laser with GaAs coupler,” Opt. Commun. 237, 411 (2004).

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L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
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S. H. Kassani, R. Khazaeinezhad, H. Jeong, T. Nazari, D. Yeom, and K. Oh, “All-fiber Er-doped Q-switched laser based on tungsten disulfide saturable absorber,” Opt. Express 5(2), 373–379 (2015).

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Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Y. L. Yan, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic-layer graphene as a saturable absorber for ultrafast pulsed lasers,” Adv. Funct. Mater. 19, 3077–3083 (2009).

Ning, Q. Y.

Novoselov, K. S.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
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H. Kataura, Y. Kumazawaa, Y. Maniwaa, I. Umezub, S. Suzukic, Y. Ohtsukac, and Y. Achibac, “Optical properties of single-wall carbon nanotubes,” Synth. Met. 103, 2555–2558 (1999).

Ottaway, D. J.

Pasiskevicius, V.

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

Peirov, A.

A. Levoshkin, A. Peirov, and J. E. Montage, “High efficiency diode pumped Q-switched Yb:Er:glass laser,” Opt. Commun. 185(4–6), 399–405 (2000).

Peng, J.

Y. J. Cheng, J. Peng, B. Xu, H. Yang, Z. Q. Luo, H. Y. Xu, Z. P. Cai, and J. Weng, “Passive Q-switching of a diode-pumped Pr:LiYF4 visible laser using WS2 as saturable absorber,” IEEE Photonics J. 8(3), 1501606 (2016).

Perea-López, N.

H. R. Gutiérrez, N. Perea-López, A. L. Elías, A. Berkdemir, B. Wang, R. Lv, F. López-Urías, V. H. Crespi, H. Terrones, and M. Terrones, “Extraordinary room-temperature photoluminescence in triangular WS2 monolayers,” Nano Lett. 13(8), 3447–3454 (2013).
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N. Hendaoui, A. Peremans, P. G. Schunemann, K. T. Zawilski, and V. Petrov, “Synchronously pumped OPO for picoseond pulse generation in the mid-infrared near 6.45 µm using AgGaS2 and CdSiP2: a comparative study,” Laser Phys. 23, 085401 (2013).

Peres, N. M. R.

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science 320(5881), 1308 (2008).
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N. Hendaoui, A. Peremans, P. G. Schunemann, K. T. Zawilski, and V. Petrov, “Synchronously pumped OPO for picoseond pulse generation in the mid-infrared near 6.45 µm using AgGaS2 and CdSiP2: a comparative study,” Laser Phys. 23, 085401 (2013).

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

V. Petrov, J. J. Zondy, O. Bidault, L. Isaenko, V. Vedenyapin, A. Yelisseyev, W. D. Chen, A. Tyazhev, S. Lobanov, G. Marchev, and D. Kolker, “Optical, thermal, electrical, damage, and phase-matching properties of lithium selenoindate,” J. Opt. Soc. Am. B 27(9), 1902–1927 (2010).

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A. Klein, S. Tiefenbacher, V. Eyert, C. Pettenkofer, and W. Jaegermann, “Electronic band structure of single-crystal and single-layer WS2 influence of interlayer van der Waals interactions,” Phys. Rev. B 64(20), 205416 (2001).

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Pirzio, F.

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

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Qian, L.

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J. P. Qiao, J. Zhao, K. J. Yang, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, W. C. Qiao, and H. W. Chu, “Intracavity KTP OPO pumped by a doubly Q-switched laser with AOM and a monolayer graphene saturable absorber,” Opt. Mater. 50, 234–237 (2015).

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Qiao, W. C.

W. J. Tang, Y. G. Wang, K. J. Yang, J. Zhao, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, and W. C. Qiao, “1.36 W passively Q-switched YVO4/Nd:YVO4 laser with a WS2 saturable absorber,” IEEE Photonics Technol. Lett. 29(5), 470–473 (2017).

J. P. Qiao, J. Zhao, K. J. Yang, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, W. C. Qiao, and H. W. Chu, “Intracavity KTP OPO pumped by a doubly Q-switched laser with AOM and a monolayer graphene saturable absorber,” Opt. Mater. 50, 234–237 (2015).

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J. Liu, Y. Wang, Z. Qu, and X. Fan, “2 μm passive Q-switched mode-locked Tm3+:YAP laser with single-walled carbon nanotube absorber,” Opt. Laser Technol. 44(4), 960–962 (2012).

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J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).

Razzaghi, H.

F. Hajiesmaeilbaigi, H. Razzaghi, M. Mahdizadeh, and M. R. A. Moghaddam, “High-average-power diode-side-pumped double Q-switched Nd:YAG laser,” Laser Phys. Lett. 4(4), 261–264 (2007).

Reali, G.

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

Ribeiro, R. M.

L. Britnell, R. M. Ribeiro, A. Eckmann, R. Jalil, B. D. Belle, A. Mishchenko, Y. J. Kim, R. V. Gorbachev, T. Georgiou, S. V. Morozov, A. N. Grigorenko, A. K. Geim, C. Casiraghi, A. H. Castro Neto, and K. S. Novoselov, “Strong light-matter interactions in Heterostructures of atomically thin films,” Science 340(6138), 1311–1314 (2013).
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R. Wang, B. Ruzicka, N. Kumar, M. Bellus, H. Chiu, and H. Zhao, “Ultrafast and spatially resolved studies of charge carriers in atomically-thin molybdenum disulfide,” Phys. Rev. B 87, 161403 (2013).

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Schunemann, P. G.

N. Hendaoui, A. Peremans, P. G. Schunemann, K. T. Zawilski, and V. Petrov, “Synchronously pumped OPO for picoseond pulse generation in the mid-infrared near 6.45 µm using AgGaS2 and CdSiP2: a comparative study,” Laser Phys. 23, 085401 (2013).

Shen, D.

Shen, Z. X.

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Y. L. Yan, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic-layer graphene as a saturable absorber for ultrafast pulsed lasers,” Adv. Funct. Mater. 19, 3077–3083 (2009).

Shin, H. S.

M. Chhowalla, H. S. Shin, G. Eda, L. J. Li, K. P. Loh, and H. Zhang, “The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets,” Nat. Chem. 5(4), 263–275 (2013).
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Shuai, Z.

Y. Chen, J. Xi, D. O. Dumcenco, Z. Liu, K. Suenaga, D. Wang, Z. Shuai, Y. S. Huang, and L. Xie, “Tunable band gap photoluminescence from atomically thin transition-metal dichalcogenide alloys,” ACS Nano 7(5), 4610–4616 (2013).
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J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).

Stauber, T.

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science 320(5881), 1308 (2008).
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Su, K.

Y. Huang, H. Cho, K. Su, and Y. Chen, “Dual-wavelength intracavity OPO with a diffusion-bonded Nd:YVO4/Nd:GdVO4 crystal,” IEEE Photonics Technol. Lett. 28, 1123 (2016).

Su, K. W.

Su, L.

W. Cai, S. Jiang, S. Xu, Y. Li, J. Liu, C. Li, L. Zheng, L. Su, and J. Xu, “Graphene saturable absorber for diode pumped Yb:Sc2SiO5 mode-locked laser,” Opt. Laser Technol. 65, 1–4 (2015).

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W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

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W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

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Takei, N.

N. Takei, S. Suzuki, and F. Kannari, “Compensation of thermal lensing in an eye-safe cascade Raman laser with Ba(NO3)2 crystal,” in Conference on Lasers and Electro-Optics, Pacific Rim, 99(3), 744–755 (1999).

Tan, P.-H.

W. Zhao, Z. Ghorannevis, L. Chu, M. Toh, C. Kloc, P.-H. Tan, and G. Eda, “Evolution of electronic structure in atomically thin sheets of WS2 and WSe2.,” ACS Nano 7(1), 791–797 (2013).
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Tang, D.

Tang, D. Y.

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Y. L. Yan, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic-layer graphene as a saturable absorber for ultrafast pulsed lasers,” Adv. Funct. Mater. 19, 3077–3083 (2009).

Tang, W. J.

W. J. Tang, Y. G. Wang, K. J. Yang, J. Zhao, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, and W. C. Qiao, “1.36 W passively Q-switched YVO4/Nd:YVO4 laser with a WS2 saturable absorber,” IEEE Photonics Technol. Lett. 29(5), 470–473 (2017).

Tao, X. T.

W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

Tartara, L.

Terrones, H.

H. R. Gutiérrez, N. Perea-López, A. L. Elías, A. Berkdemir, B. Wang, R. Lv, F. López-Urías, V. H. Crespi, H. Terrones, and M. Terrones, “Extraordinary room-temperature photoluminescence in triangular WS2 monolayers,” Nano Lett. 13(8), 3447–3454 (2013).
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Terrones, M.

A. Berkdemir, H. R. Gutierrez, A. R. Botello-Mendez, N. P. López, A. L. Elías, C. I. Chia, B. Wang, V. H. Crespi, F. L. Urias, J. C. Charlier, H. Terrones, and M. Terrones, “Identification of individual and few layers of WS2 using Raman Spectroscopy,” Sci. Rep. 3, 1755 (2013).

H. R. Gutiérrez, N. Perea-López, A. L. Elías, A. Berkdemir, B. Wang, R. Lv, F. López-Urías, V. H. Crespi, H. Terrones, and M. Terrones, “Extraordinary room-temperature photoluminescence in triangular WS2 monolayers,” Nano Lett. 13(8), 3447–3454 (2013).
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Thilmann, N.

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

Tiefenbacher, S.

A. Klein, S. Tiefenbacher, V. Eyert, C. Pettenkofer, and W. Jaegermann, “Electronic band structure of single-crystal and single-layer WS2 influence of interlayer van der Waals interactions,” Phys. Rev. B 64(20), 205416 (2001).

Toh, M.

W. Zhao, Z. Ghorannevis, L. Chu, M. Toh, C. Kloc, P.-H. Tan, and G. Eda, “Evolution of electronic structure in atomically thin sheets of WS2 and WSe2.,” ACS Nano 7(1), 791–797 (2013).
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Tyazhev, A.

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

V. Petrov, J. J. Zondy, O. Bidault, L. Isaenko, V. Vedenyapin, A. Yelisseyev, W. D. Chen, A. Tyazhev, S. Lobanov, G. Marchev, and D. Kolker, “Optical, thermal, electrical, damage, and phase-matching properties of lithium selenoindate,” J. Opt. Soc. Am. B 27(9), 1902–1927 (2010).

Umezub, I.

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W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

Wang, A.

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
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Wang, J.

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J. Wang, S. Z. Zhao, G. Q. Li, K. J. Yang, D. C. Li, J. An, and M. Li, “Pulse compression in laser-diode-pumped doubly Q-switched intracavity optical parametric oscillator considering Gaussian distribution of intracavity photon densities,” Jpn. J. Appl. Phys. 46(4), 1505–1510 (2007).

Wang, M.

M. Wang, K. Zhong, J. Mei, S. Guo, D. Xu, and J. Yao, “Simultaneous dual-wavelength eye-safe KTP OPO intracavity pumped by a Nd:GYSGG laser,” J. Phys. D Appl. Phys. 49, 065101 (2016).

Wang, Q. P.

W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

Wang, R.

R. Wang, B. Ruzicka, N. Kumar, M. Bellus, H. Chiu, and H. Zhao, “Ultrafast and spatially resolved studies of charge carriers in atomically-thin molybdenum disulfide,” Phys. Rev. B 87, 161403 (2013).

Wang, S.

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
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W. Y. Cheng, S. Z. Zhao, Z. Zhuo, X. M. Zhang, and Y. Wang, “Laser-diode side-pumped actively Q-switched eye-safe intracavity optical parametric oscillator,” Opt. Lasers Eng. 46(1), 12–17 (2008).

Wang, Y. G.

W. J. Tang, Y. G. Wang, K. J. Yang, J. Zhao, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, and W. C. Qiao, “1.36 W passively Q-switched YVO4/Nd:YVO4 laser with a WS2 saturable absorber,” IEEE Photonics Technol. Lett. 29(5), 470–473 (2017).

Weng, J.

Y. J. Cheng, J. Peng, B. Xu, H. Yang, Z. Q. Luo, H. Y. Xu, Z. P. Cai, and J. Weng, “Passive Q-switching of a diode-pumped Pr:LiYF4 visible laser using WS2 as saturable absorber,” IEEE Photonics J. 8(3), 1501606 (2016).

Wong, H.

Woodward, R. I.

R. C. T. Howe, R. I. Woodward, G. Hu, Z. Yang, E. J. R. Kelleher, and T. Hasan, “Surfactant-aided exfoliation of molybdenum disulfide for ultrafast pulse generation through edge-state saturable absorption,” xs Solidi. B 253(5), 911–917 (2016).

Wu, K.

Wu, R. F.

Xi, J.

Y. Chen, J. Xi, D. O. Dumcenco, Z. Liu, K. Suenaga, D. Wang, Z. Shuai, Y. S. Huang, and L. Xie, “Tunable band gap photoluminescence from atomically thin transition-metal dichalcogenide alloys,” ACS Nano 7(5), 4610–4616 (2013).
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Xie, G.

Xie, L.

Y. Chen, J. Xi, D. O. Dumcenco, Z. Liu, K. Suenaga, D. Wang, Z. Shuai, Y. S. Huang, and L. Xie, “Tunable band gap photoluminescence from atomically thin transition-metal dichalcogenide alloys,” ACS Nano 7(5), 4610–4616 (2013).
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Y. J. Cheng, J. Peng, B. Xu, H. Yang, Z. Q. Luo, H. Y. Xu, Z. P. Cai, and J. Weng, “Passive Q-switching of a diode-pumped Pr:LiYF4 visible laser using WS2 as saturable absorber,” IEEE Photonics J. 8(3), 1501606 (2016).

Xu, D.

M. Wang, K. Zhong, J. Mei, S. Guo, D. Xu, and J. Yao, “Simultaneous dual-wavelength eye-safe KTP OPO intracavity pumped by a Nd:GYSGG laser,” J. Phys. D Appl. Phys. 49, 065101 (2016).

Xu, H. Y.

Y. J. Cheng, J. Peng, B. Xu, H. Yang, Z. Q. Luo, H. Y. Xu, Z. P. Cai, and J. Weng, “Passive Q-switching of a diode-pumped Pr:LiYF4 visible laser using WS2 as saturable absorber,” IEEE Photonics J. 8(3), 1501606 (2016).

Xu, J.

W. Cai, S. Jiang, S. Xu, Y. Li, J. Liu, C. Li, L. Zheng, L. Su, and J. Xu, “Graphene saturable absorber for diode pumped Yb:Sc2SiO5 mode-locked laser,” Opt. Laser Technol. 65, 1–4 (2015).

Xu, S.

W. Cai, S. Jiang, S. Xu, Y. Li, J. Liu, C. Li, L. Zheng, L. Su, and J. Xu, “Graphene saturable absorber for diode pumped Yb:Sc2SiO5 mode-locked laser,” Opt. Laser Technol. 65, 1–4 (2015).

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
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Xu, Y.

H. Lin, X. Huang, X. Liu, D. Sun, W. Zhu, and Y. Xu, “Passively Q-switched c-cut Nd:YVO4 laser using graphene-oxide as a saturable absorber,” Optik (Stuttg.) 127(10), 4545–4546 (2016).

Yan, Y.

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
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Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Y. L. Yan, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic-layer graphene as a saturable absorber for ultrafast pulsed lasers,” Adv. Funct. Mater. 19, 3077–3083 (2009).

Yang, H.

Y. J. Cheng, J. Peng, B. Xu, H. Yang, Z. Q. Luo, H. Y. Xu, Z. P. Cai, and J. Weng, “Passive Q-switching of a diode-pumped Pr:LiYF4 visible laser using WS2 as saturable absorber,” IEEE Photonics J. 8(3), 1501606 (2016).

Yang, K.

Yang, K. J.

W. J. Tang, Y. G. Wang, K. J. Yang, J. Zhao, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, and W. C. Qiao, “1.36 W passively Q-switched YVO4/Nd:YVO4 laser with a WS2 saturable absorber,” IEEE Photonics Technol. Lett. 29(5), 470–473 (2017).

J. P. Qiao, J. Zhao, K. J. Yang, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, W. C. Qiao, and H. W. Chu, “Intracavity KTP OPO pumped by a doubly Q-switched laser with AOM and a monolayer graphene saturable absorber,” Opt. Mater. 50, 234–237 (2015).

J. Wang, S. Z. Zhao, G. Q. Li, K. J. Yang, D. C. Li, J. An, and M. Li, “Pulse compression in laser-diode-pumped doubly Q-switched intracavity optical parametric oscillator considering Gaussian distribution of intracavity photon densities,” Jpn. J. Appl. Phys. 46(4), 1505–1510 (2007).

Yang, Z.

R. C. T. Howe, R. I. Woodward, G. Hu, Z. Yang, E. J. R. Kelleher, and T. Hasan, “Surfactant-aided exfoliation of molybdenum disulfide for ultrafast pulse generation through edge-state saturable absorption,” xs Solidi. B 253(5), 911–917 (2016).

Yao, J.

M. Wang, K. Zhong, J. Mei, S. Guo, D. Xu, and J. Yao, “Simultaneous dual-wavelength eye-safe KTP OPO intracavity pumped by a Nd:GYSGG laser,” J. Phys. D Appl. Phys. 49, 065101 (2016).

Yao, W.

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
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Yu, H.

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
[PubMed]

G. Xie, J. Ma, P. Lv, W. Gao, P. Yuan, L. Qian, H. Yu, H. Zhang, J. Wang, and D. Tang, “Graphene saturable absorber for Q-switching and mode locking at 2μm wavelength,” Opt. Mater. Express 2(6), 878–883 (2012).

Yuan, P.

Zawilski, K. T.

N. Hendaoui, A. Peremans, P. G. Schunemann, K. T. Zawilski, and V. Petrov, “Synchronously pumped OPO for picoseond pulse generation in the mid-infrared near 6.45 µm using AgGaS2 and CdSiP2: a comparative study,” Laser Phys. 23, 085401 (2013).

Zeng, H.

D. Mao, S. Zhang, Y. Wang, X. Gan, W. Zhang, T. Mei, Y. Wang, Y. Wang, H. Zeng, and J. Zhao, “WS2 saturable absorber for dissipative soliton mode locking at 1.06 and 1.55 µm,” Opt. Express 23(21), 27509–27519 (2015).
[PubMed]

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
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Zhang, H.

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
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Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Y. L. Yan, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic-layer graphene as a saturable absorber for ultrafast pulsed lasers,” Adv. Funct. Mater. 19, 3077–3083 (2009).

Zhang, M.

M. Zhang, G. Hu, G. Hu, R. C. T. Howe, L. Chen, Z. Zheng, and T. Hasan, “Yb- and Er-doped fiber laser Q-switched with an optically uniform, broadband WS2 saturable absorber,” Sci. Rep. 5, 17482 (2015).
[PubMed]

Zhang, S.

Zhang, W.

Zhang, X.

Zhang, X. M.

W. Y. Cheng, S. Z. Zhao, Z. Zhuo, X. M. Zhang, and Y. Wang, “Laser-diode side-pumped actively Q-switched eye-safe intracavity optical parametric oscillator,” Opt. Lasers Eng. 46(1), 12–17 (2008).

Zhang, X. Y.

W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

Zhao, H.

R. Wang, B. Ruzicka, N. Kumar, M. Bellus, H. Chiu, and H. Zhao, “Ultrafast and spatially resolved studies of charge carriers in atomically-thin molybdenum disulfide,” Phys. Rev. B 87, 161403 (2013).

Zhao, J.

Zhao, M.

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
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Zhao, S.

Zhao, S. Z.

W. J. Tang, Y. G. Wang, K. J. Yang, J. Zhao, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, and W. C. Qiao, “1.36 W passively Q-switched YVO4/Nd:YVO4 laser with a WS2 saturable absorber,” IEEE Photonics Technol. Lett. 29(5), 470–473 (2017).

J. P. Qiao, J. Zhao, K. J. Yang, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, W. C. Qiao, and H. W. Chu, “Intracavity KTP OPO pumped by a doubly Q-switched laser with AOM and a monolayer graphene saturable absorber,” Opt. Mater. 50, 234–237 (2015).

W. Y. Cheng, S. Z. Zhao, Z. Zhuo, X. M. Zhang, and Y. Wang, “Laser-diode side-pumped actively Q-switched eye-safe intracavity optical parametric oscillator,” Opt. Lasers Eng. 46(1), 12–17 (2008).

J. Wang, S. Z. Zhao, G. Q. Li, K. J. Yang, D. C. Li, J. An, and M. Li, “Pulse compression in laser-diode-pumped doubly Q-switched intracavity optical parametric oscillator considering Gaussian distribution of intracavity photon densities,” Jpn. J. Appl. Phys. 46(4), 1505–1510 (2007).

Zhao, W.

W. Zhao, Z. Ghorannevis, L. Chu, M. Toh, C. Kloc, P.-H. Tan, and G. Eda, “Evolution of electronic structure in atomically thin sheets of WS2 and WSe2.,” ACS Nano 7(1), 791–797 (2013).
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Zheng, L.

C. Luan, K. Yang, J. Zhao, S. Zhao, L. Song, T. Li, H. Chu, J. Qiao, C. Wang, Z. Li, S. Jiang, B. Man, and L. Zheng, “WS2 as a saturable absorber for Q-switched 2 micron lasers,” Opt. Lett. 41(16), 3783–3786 (2016).
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W. Cai, S. Jiang, S. Xu, Y. Li, J. Liu, C. Li, L. Zheng, L. Su, and J. Xu, “Graphene saturable absorber for diode pumped Yb:Sc2SiO5 mode-locked laser,” Opt. Laser Technol. 65, 1–4 (2015).

Zheng, Z.

M. Zhang, G. Hu, G. Hu, R. C. T. Howe, L. Chen, Z. Zheng, and T. Hasan, “Yb- and Er-doped fiber laser Q-switched with an optically uniform, broadband WS2 saturable absorber,” Sci. Rep. 5, 17482 (2015).
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Zhong, K.

M. Wang, K. Zhong, J. Mei, S. Guo, D. Xu, and J. Yao, “Simultaneous dual-wavelength eye-safe KTP OPO intracavity pumped by a Nd:GYSGG laser,” J. Phys. D Appl. Phys. 49, 065101 (2016).

Zhu, B.

H. Zeng, G.-B. Liu, J. Dai, Y. Yan, B. Zhu, R. He, L. Xie, S. Xu, X. Chen, W. Yao, and X. Cui, “Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides,” Sci. Rep. 3, 1608 (2013).
[PubMed]

Zhu, W.

H. Lin, X. Huang, X. Liu, D. Sun, W. Zhu, and Y. Xu, “Passively Q-switched c-cut Nd:YVO4 laser using graphene-oxide as a saturable absorber,” Optik (Stuttg.) 127(10), 4545–4546 (2016).

Zhuo, Z.

T. Li, S. Zhao, Z. Zhuo, K. Yang, G. Li, and D. Li, “Dual-loss-modulated Q-switched and mode-locked YVO4/Nd:YVO4/KTP green laser with EO and Cr4+:YAG saturable absorber,” Opt. Express 18(10), 10315–10322 (2010).
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W. Y. Cheng, S. Z. Zhao, Z. Zhuo, X. M. Zhang, and Y. Wang, “Laser-diode side-pumped actively Q-switched eye-safe intracavity optical parametric oscillator,” Opt. Lasers Eng. 46(1), 12–17 (2008).

Zondy, J. J.

ACS Nano (2)

W. Zhao, Z. Ghorannevis, L. Chu, M. Toh, C. Kloc, P.-H. Tan, and G. Eda, “Evolution of electronic structure in atomically thin sheets of WS2 and WSe2.,” ACS Nano 7(1), 791–797 (2013).
[PubMed]

Y. Chen, J. Xi, D. O. Dumcenco, Z. Liu, K. Suenaga, D. Wang, Z. Shuai, Y. S. Huang, and L. Xie, “Tunable band gap photoluminescence from atomically thin transition-metal dichalcogenide alloys,” ACS Nano 7(5), 4610–4616 (2013).
[PubMed]

Adv. Funct. Mater. (1)

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Y. L. Yan, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic-layer graphene as a saturable absorber for ultrafast pulsed lasers,” Adv. Funct. Mater. 19, 3077–3083 (2009).

Adv. Mater. (1)

S. Wang, H. Yu, H. Zhang, A. Wang, M. Zhao, Y. Chen, L. Mei, and J. Wang, “Broadband few-layer MoS2 saturable absorbers,” Adv. Mater. 26(21), 3538–3544 (2014).
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Appl. Phys. B (4)

Y. F. Chen, S. W. Chen, S. W. Tsai, and Y. P. Lan, “High-repetition-rate eye-safe optical parametric oscillator intracavity pumped by a diode-pumped Q-switched Nd:YVO4 laser,” Appl. Phys. B 76(3), 263–266 (2003).

Y. F. Chen, S. W. Chen, L. Y. Tsai, Y. C. Chen, and C. H. Chien, “Efficient sub-nanosecond intracavity optical parametric oscillator pumped with a passively Q-switched Nd:GdVO4 laser,” Appl. Phys. B 79(7), 823–825 (2004).

W. J. Sun, Q. P. Wang, Z. J. Liu, X. Y. Zhang, F. Bai, X. B. Wan, G. F. Jin, X. T. Tao, and Y. X. Sun, “High efficiency KTiOAsO4 optical parametric oscillator within a diode-side-pumped two-rod Nd:YAG laser,” Appl. Phys. B 104(1), 87–91 (2011).

G. Marchev, P. Dallocchio, F. Pirzio, A. Agnesi, G. Reali, V. Petrov, A. Tyazhev, V. Pasiskevicius, N. Thilmann, and F. Laurell, “Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically poled KTP crystal pumped at 1064 nm,” Appl. Phys. B 109(2), 211–214 (2012).

Appl. Phys. Lett. (1)

J. Dawlaty, S. Shivaraman, M. Chandrashekhar, F. Rana, and M. Spencer, “Measurement of ultrafast carrier dynamics in epitaxial graphene,” Appl. Phys. Lett. 92, 042116 (2008).

Electron. Lett. (1)

A. Rutz, R. Grange, V. Liverini, M. Haiml, S. Schon, and U. Keller, “1.5 μm GaInNAs semiconductor saturable absorber for passively modelocked solid-state lasers,” Electron. Lett. 41, 321–323 (2005).

IEEE J. Sel. Top. Quantum Electron. (1)

F. J. Jia, H. Chen, P. Liu, Y. Z. Huang, and Z. Q. Luo, “Nanosecond-pulse, dual-wavelength passively Q-switched c-cut Nd:YVO4 laser using a few-layer Bi2Se3 saturable absorber,” IEEE J. Sel. Top. Quantum Electron. 21(1), 1601806 (2015).

IEEE Photonics J. (1)

Y. J. Cheng, J. Peng, B. Xu, H. Yang, Z. Q. Luo, H. Y. Xu, Z. P. Cai, and J. Weng, “Passive Q-switching of a diode-pumped Pr:LiYF4 visible laser using WS2 as saturable absorber,” IEEE Photonics J. 8(3), 1501606 (2016).

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W. J. Tang, Y. G. Wang, K. J. Yang, J. Zhao, S. Z. Zhao, G. Q. Li, D. C. Li, T. Li, and W. C. Qiao, “1.36 W passively Q-switched YVO4/Nd:YVO4 laser with a WS2 saturable absorber,” IEEE Photonics Technol. Lett. 29(5), 470–473 (2017).

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Figures (7)

Fig. 1
Fig. 1 Characterization of the prepared WS2-SA: (a) AFM image; (b) height variation; (c) SEM image; (d) Raman spectra; (e) Linear transmittance spectrum; (f) Nonlinear transmittance curve versus input pulse influence.
Fig. 2
Fig. 2 Experimental setup of a hybrid Q-switched Nd:YVO4 laser with an AOM and a WS2-SA.
Fig. 3
Fig. 3 Laser characteristics of the singly Q-switched laser with a WS2-SA and hybrid Q-switched laser with a WS2-SA and an AOM.
Fig. 4
Fig. 4 Experimental setup of KTP based IOPO pumped by a hybrid Q-switched Nd:YVO4 laser with an AOM and a WS2-SA.
Fig. 5
Fig. 5 (a)-(b): Average output powers and pulse durations of the HIOPO versus incident pump power at the AOM repetition rates of 10, 20 and 30 kHz. (c): A typical spectrum of the HIOPO at an incident pump power of 10.2 W and an AOM repetition rate of 10 kHz.
Fig. 6
Fig. 6 Temporal pulse shapes of signal and fundamental lights at an incident pump power of 10.2 W and an AOM repetition rate of 10 kHz.
Fig. 7
Fig. 7 Single pulse energies and peak powers of the HIOPO versus incident pump power at the AOM repetition rates of 10 kHz, 20 kHz and 30 kHz.

Tables (1)

Tables Icon

Table 1 Comparisons of the IOPOs pumped by the hybrid Q-switched lasers with an AOM and different 2D materials.

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