Abstract

We demonstrate a large-energy, wavelength-tunable, all-fiber passively Q-switched Er:Yb-codoped laser using a mono-layer chemical vapor deposition (CVD) graphene saturable absorber (SA). By exploiting the large laser gain of Er:Yb double-clad fiber and optimizing the coupling ratio of the output coupler, not only can the mono-layer CVD graphene SA be protected from oversaturation and thermal damage, but also a large pulse energy up to 1.05 μJ (corresponding to the average output power of 25.6 mW) is thus achieved. Using a tunable fiber Fabry–Perot filter, stable Q-switched pulses can operate with a tunable range from 1530.97 to 1546.92 nm, covering a wavelength range of 16nm. The Q-switching states at the different lasing wavelengths have been observed and recorded. The Q-switched repetition rate and the pulse duration (with the minimum one of 2.6 μs) have been characterized as well. This is, to the best of our knowledge, the largest pulse energy from an all-fiber graphene Q-switched laser.

© 2014 Optical Society of America

1. Introduction

Wavelength-tunable Q-switched fiber lasers have attracted much attention due to their intensive applications in communications, reflectometry, and fiber optical sensing. Compared to an actively Q-switched fiber laser, a passive one with a saturable absorber (SA) could be preferred because of the advantages of compactness, low cost, and flexibility in design.

In recent years, passively Q-switched fiber lasers have been widely reported using several kinds of SAs, e.g., semiconductor saturable-absorption mirrors [1], carbon nanotubes [2], topological insulators [3,4], and graphene [527]. Among these SAs, graphene, an ultrabroadband wavelength-independent saturable-absorption material, has been well recognized for realizing wavelength widely tunable Q-switched fiber lasers, especially in erbium-doped fiber (EDF) lasers [58]. At present, the largest tunable range of 50.5 nm was reported from a graphene-based Q-switched EDF laser using a tunable band-pass filter [5]. However, because graphene has a relatively low saturating intensity and low damage threshold, Q-switching operation in a graphene-based fiber laser could disappear under only moderate pumping intensity, also strongly restricting the available pulse energy. By surveying those graphene-based Q-switched all-fiber lasers reported previously, one can find the record pulse energy is only 184 nJ [9]. To scale up the Q-switched pulse energy and the damage power of graphene SA, some researchers have recently attempted to expand the laser spot for purposely declining the optical intensity injected into graphene SA. The use of such a method has successfully obtained a pulse energy as high as 18 μJ and an average output power of 5.1 W from a graphene-based Q-switched Tm3+-doped fiber laser [10], but it suffers from the bulky construction and requires complex coupling alignment from free-space into small-core fiber. Therefore, there are always strong motivations to develop large-energy, all-fiber tunable lasers Q-switched by graphene SA.

On the one hand, most previous works [8,1015] have used multilayer graphene by liquid-phase exfoliation or the chemical vapor deposition (CVD) method. Although multilayer graphene could partially enhance the absolute modulation depth of the whole SA, larger nonsaturable loss is induced and easily accumulates more thermal energy in the SA, leading to a lower damage threshold and finally limiting the available pulse energy. In contrast, mono-layer graphene as a SA will provide the following advantages: (1) very low nonsaturable loss (2.3% [28]) is favorable to a relatively higher damage threshold, and (2) the use of a mono-layer structure could be better to reflect the intrinsic optical properties or physics of graphene [29]. On the other hand, instead of the conventional single-mode EDF used in some graphene-based Q-switched fiber lasers reported previously [58,1222], Er:Yb-codoped double-clad fiber (EYDCF) as the laser gain medium could be more preferable because (1) Er:Yb-codoped fiber possesses higher absorption/pumping efficiencies due to the prevention of Er clusters and the nonradiative cross-relaxation effect between Yb and Er ions, and (2) the active double-clad fiber possibly provides ultralarge gain, and can support extracting the greater part of the intracavity laser as output power, therefore obtaining large pulse energy.

In this paper, by combining a mono-layer CVD graphene SA and a section of EYDCF as the gain medium, we successfully achieve a wavelength-tunable, large-energy, all-fiber passively Q-switched laser. By properly arranging the cavity-component positions (e.g., output coupler, graphene SA), the Q-switching operation can generate large pulse energy up to 1.05 μJ, minimum pulse duration of 2.6 μs, and tunable lasing wavelength of 1530.97–1546.92 nm. To the best of our knowledge, this is the largest single pulse energy in graphene-based passively Q-switched all-fiber lasers.

2. Mono-Layer CVD Graphene and Experimental Setup

The mono-layer graphene was grown by the CVD technique as described in the supporting material of Ref. [30]. By using a mixture of methane and hydrogen with temperature up to 1000°C, graphene films were grown on copper foils. Then graphene films were removed from the Cu foils by coating polymethyl methacrylate (PMMA) and dissolving Cu in an aqueous solution of Ammorium Persulphate. Finally, the PMMA/graphene was transferred onto the facet of a fiber ferrule. The PMMA layer served as a support preventing the graphene film from collapsing during copper etching and damaging during fiber ferrule connecting. The inset of Fig. 1 is a photograph of the fabricated PMMA/graphene fiber ferrule. One can easily see that the PMMA/graphene film has been effectively covered onto the fiber ferrule. After being transferred, the PMMA/graphene was detected by Raman spectroscopy, and the typical Raman spectrum of the graphene by subtracting the Raman peaks of the PMMA is shown in Fig. 1. The D peak is very weak, indicating good quality of our graphene. The intensity of the 2D band at the center wavenumber of 2695.1cm1 is much higher than that of the G band at 1586.4cm1. The intensity ratio (2D/G) is more than 2, and the FWHM of the 2D band is about 30cm1, indicating the mono-layer of our graphene [31,32].

 

Fig. 1. Raman spectrum of graphene with photograph of the PMMA/graphene fiber ferrule.

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In our experiment, the PMMA/graphene fiber ferrule was further connected with another new fiber ferrule to construct a fiber-compatible graphene SA. Then, the graphene SA was incorporated into a laser-diode-pumped EYDCF laser cavity. Figure 2 shows the schematic of the wavelength-tunable, all-fiber graphene-based passively Q-switched Er:Yb laser. A piece of 1.2 m EYDCF (Nufern, SM-EYDF-7/130) as gain medium was pumped by a 975 nm LD through a 975/1550nm fiber combiner. A circulator was used to force the unidirectional light propagation and protect the graphene from the perturbance of the counterclockwise ASE light. A 5050 optical coupler was used as a broadband fiber loop mirror to reflect the laser. A fiber Fabry–Perot tunable filter (Micron Optics Inc. Serial NO. 10171; tuning range of 140 nm; insertion loss of <1dB) was inserted into the cavity to tune the lasing wavelength. A 2080 fiber coupler was used to extract the 80% intracavity light as the laser output. The cavity length is about 10.2 m with total loss of 5dB. We deliberately designed the extraction of the large-part (80%) intracavity laser with the following purposes: (1) reducing the light power injected into the graphene SA and protecting it from thermal damage and oversaturablity under moderate pumping, (2) obtaining a relatively large output power (corresponding to large pulse energy), and (3) benefiting from the use of large-gain EYDCF, the pump threshold might still not be very high. The optical spectrum, the radio-frequency (RF) spectrum, the Q-switched pulse trains, and the average output power were monitored and measured by an optical spectrum analyzer (OSA) and a RF spectrum analyzer together with a photodetector, a 100 MHz oscilloscope, and a power meter, respectively.

 

Fig. 2. Schematic of the EYDCF Q-switched fiber laser.

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3. Results and Discussion

In the experiment, continuous-wave operation occurred at an incident pump power of 161.8 mW with a central wavelength of 1535.05 nm. Once the pump power exceeded 170.9 mW, a stable Q-switched pulse was observed. By continuously tuning the transmission peak of the fiber Fabry–Perot filter, the central wavelength of the laser tuned correspondingly and the stable Q-switched pulse trains on the oscilloscope screen remained. At a pump power of 582.4 mW, the central wavelength could be continuously tuned from 1530.97 to 1546.92 nm, covering a wavelength range of 16nm, as shown in Fig. 3. At four different operating wavelengths of 1546.92, 1541.35, 1535.52, and 1530.97 nm, we respectively recorded the typical pulse trains (Fig. 4). All of them were stable with a pulse intensity fluctuation of less than 5%. However, one can obviously see that, at the same pump power of 582.4 mW, the pulse repetition rate was changing at different wavelengths.

 

Fig. 3. Spectra of wavelength-tunable Q-switched operation.

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Fig. 4. Output pulse train at different wavelengths: (a) 1546.92 nm, (b) 1541.35 nm, (c) 1535.52 nm, and (d) 1530.97 nm.

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To further investigate the variation of the Q-switching operation during the wavelength-tuning process, we measured the output power and pulse repetition rate as a function of the operation wavelength, as shown in Fig. 5. Without the fiber Fabry–Perot filter, the laser exhibited Q-switching at 1535nm. After inserting the filter, the max output power of 24.8 mW came out at 1535.05 nm. When the Q-switching wavelength shifted toward either a longer or a shorter one, the output power decreased gradually. While tuning the lasing wavelength from 1530.92 to 1546.97 nm, the average output power could vary from 2.1 to 24.8 mW. The change of the average output power with different wavelengths should be attributed to the dependences of the EYDCF’s gain spectrum and the cavity loss. As shown in Fig. 5, the variation of the Q-switched repetition rates with the operation wavelengths is similar to that of the output power. This is easily explained as follows. With the larger output power, the intracavity laser is stronger, and the bleaching of graphene SA is faster under a faster population inversion/depletion, leading to larger repetition rates. At the same pump power of 582.4 mW, the repetition rate can vary from 7.5 to 25.5 kHz with the different operation wavelength.

 

Fig. 5. Output average power and pulse energy at different wavelengths within tuning range.

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Then, we concentrated on the Q-switched output performance at the lasing wavelength of 1535.05 nm (with the filter). Figure 6(a) shows the optical spectrum of Q-switched operation at the pump power of 453.38 mW, with an inset of a Q-switched pulse train of 21.19 kHz. The Q-switched pulse train was stable with low amplitude fluctuation. Confirmed by Fig. 6(b), the signal-to-noise ratio (SNR) of fundamental frequency at 21.19 kHz is about 50 dB, and the tenth harmonic is still larger than 33 dB from the inset.

 

Fig. 6. (a) Output spectrum and Q-switched pulse train (inset). (b) Radio-frequency optical spectrum at the fundamental frequency and the wideband RF spectrum (insert).

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The Q-switched regime remained stable with the pump power changed from 170.9 to 582.4 mW. When the pump power exceeded 582.4 mW, the Q-switched pulses became unstable and even disappeared. However, the Q-switching could be rebuilt once the pump power is less than 582.4 mW again, which indicates no damage of our graphene. It can be attributed to the thermal effect affecting the graphene, although the damage threshold does not exceed. We measured or calculated the output power, the repetition rate, the single pulse energy, and the pulsewidth as a function of the pump power. As shown in Fig. 7, when the pump power increases gradually, the output power, the repetition rate, and the single pulse energy increase most linearly, but the pulsewidth decreases monotonously. When the pump power exceeds 500 mW, the pulsewidth and repetition rate become slow to change and the drop in pulsewidth levels even stops; then the graphene SA almost saturates. The repetition rate could be continuously tuned from 7.07 to 24.48 kHz. When the laser was pumped with the maximum available launched power of 582.4 mW, the average output power was measured to be 25.6 mW and the pulse duration was 2.6 μs. The single pulse energy was calculated to be 1.05 μJ. To the best of our knowledge, this is the largest pulse energy of the graphene-based Q-switched wavelength-tunable all-fiber lasers so far. The large pulse energy is mainly attributed to the following: (1) the large-enough gain of the laser-diode-pumped EYDCF, (2) the power output of 80%, and (3) the lowest-power position of graphene in the laser cavity.

 

Fig. 7. (a) Pulse repetition rate and average output power. (b) Single pulse energy and pulsewidth as a function of the launched pump power.

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4. Conclusion

In summary, we have demonstrated a mono-layer CVD graphene-based large-energy, wavelength-tunable, all-fiber EYDCF laser. The lasing wavelength can be tuned from 1530.97 to 1546.92 nm with stable Q-switched operation. At the wavelength of 1535.05 nm, the pulse repetition rate can be tuned from 7.07 to 24.48 kHz. The largest average output power and the lowest pulse duration are measured to be 25.6 mW and 2.6 μs, respectively. The single pulse energy is calculated to be as large as 1.05 μJ. The large pulse energy benefits from the cavity-design optimization, the large-gain EYDCF, and the good quality of the mono-layer CVD graphene.

This work is financially supported by the National Natural Science Foundation of China (61275050, 61177044), the Natural Science Foundation of Fujian Province of China (2011J01370), the Specialized Research Fund for the Doctoral Program of Higher Education (20120121110034), and the Fundamental Research Funds for the Central Universities (2011121048).

References

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2. D. P. Zhou, L. Wei, B. Dong, and W. K. Liu, “Tunable passively Q-switched erbium-doped fiber laser with carbon nanotubes as a saturable absorber,” IEEE Photon. Technol. Lett. 22, 9–11 (2010). [CrossRef]  

3. Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

4. Z. Q. Luo, Y. Z. Huang, J. Weng, H. H. Cheng, Z. Q. Lin, B. Xu, Z. P. Cai, and H. Y. Xu, “1.06  μm Q-switched ytterbium-doped fiber laser using few-layer topological insulator Bi2Se3 as a saturable absorber,” Opt. Express 21, 29516–29522 (2013). [CrossRef]  

5. W. J. Cao, H. Y. Wang, A. P. Luo, Z. C. Luo, and W. C. Xu, “Graphene-based, 50  nm wide-band tunable passively Q-switched fiber laser,” Laser Phys. Lett. 9, 54–58 (2012). [CrossRef]  

6. H. Ahmad, M. Z. Zulkifli, F. D. Muhammad, A. Z. Zulkifli, and S. W. Harun, “Tunable graphene-based Q-switched erbium-doped fiber laser using fiber Bragg grating,” J. Mod. Opt. 60, 202–212 (2013). [CrossRef]  

7. D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett. 98, 073106 (2011). [CrossRef]  

8. D. P. Zhou, L. Wei, and W. K. Liu, “Tunable graphene Q-switched erbium-doped fiber laser with suppressed self-mode locking effect,” Appl. Opt. 51, 2554–2558 (2012). [CrossRef]  

9. Y. K. Yap, R. M. D. L. Rue, C. H. Pua, S. W. Harun, and H. Ahmad, “Graphene-based Q-switched pulsed fiber laser in a linear configuration,” Chin. Opt. Lett. 10, 041405 (2012). [CrossRef]  

10. Y. L. Tang, X. C. Yu, X. H. Li, Z. Y. Yan, and Q. J. Wang, “High power thulium fiber laser Q-switched with single-layer graphene,” Opt. Lett. 39, 614–617 (2014). [CrossRef]  

11. J. Liu, J. Xu, and P. Wang, “Graphene-based passively Q-switched 2  μm thulium-doped fiber laser,” Opt. Commun. 285, 5319–5322 (2012). [CrossRef]  

12. L. Wei, D. P. Zhou, H. Y. Fan, and W. K. Liu, “Graphene-based Q-switched erbium-doped fiber laser with wide pulse-repetition-rate range,” IEEE Photon. Technol. Lett. 24, 309–311 (2012). [CrossRef]  

13. Z. Z. Dong, H. P. Li, H. D. Xia, Y. Liu, Z. G. Wang, and Y. F. Chen, “Passively Q-switched erbium-doped fiber laser using a graphene saturable absorber,” in Asia Communications and Photonics Conference (Optical Society of America, 2012), paper AS1A.2.

14. D. Lv, L. H. P. Li, H. D. Xia, S. J. Zhang, and Y. Liu, “Passively Q-switched linear-cavity erbium-doped fiber laser based on graphene saturable absorber,” in 12th International Conference on Optical Communications and Networks (ICOCN) (IEEE, 2013), pp. 1–3.

15. L. Q. Zhang, Z. Zhuo, J. X. Wang, and Y. Z. Wang, “Passively Q-switched fiber laser based on graphene saturable absorber,” Laser Phys. 22, 433–436 (2012). [CrossRef]  

16. G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012). [CrossRef]  

17. J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012). [CrossRef]  

18. Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched Erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photon. J. 4, 869–876 (2012). [CrossRef]  

19. H. Ahmad, F. D. Muhammad, M. Z. Zulkifli, and S. W. Harun, “Q-switched pulse generation from an all-fiber distributed Bragg reflector laser using graphene as saturable absorber,” Chin. Opt. Lett. 11, 071401 (2013). [CrossRef]  

20. J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012). [CrossRef]  

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References

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  1. J. Y. Huang, W. C. Huang, W. Z. Zhuang, K. W. Su, Y. F. Chen, and K. F. Huang, “High-pulse-energy, passively Q-switched Yb-doped fiber laser with AlGaInAs quantum wells as a saturable absorber,” Opt. Lett. 34, 2360–2362 (2009).
    [Crossref]
  2. D. P. Zhou, L. Wei, B. Dong, and W. K. Liu, “Tunable passively Q-switched erbium-doped fiber laser with carbon nanotubes as a saturable absorber,” IEEE Photon. Technol. Lett. 22, 9–11 (2010).
    [Crossref]
  3. Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).
  4. Z. Q. Luo, Y. Z. Huang, J. Weng, H. H. Cheng, Z. Q. Lin, B. Xu, Z. P. Cai, and H. Y. Xu, “1.06  μm Q-switched ytterbium-doped fiber laser using few-layer topological insulator Bi2Se3 as a saturable absorber,” Opt. Express 21, 29516–29522 (2013).
    [Crossref]
  5. W. J. Cao, H. Y. Wang, A. P. Luo, Z. C. Luo, and W. C. Xu, “Graphene-based, 50  nm wide-band tunable passively Q-switched fiber laser,” Laser Phys. Lett. 9, 54–58 (2012).
    [Crossref]
  6. H. Ahmad, M. Z. Zulkifli, F. D. Muhammad, A. Z. Zulkifli, and S. W. Harun, “Tunable graphene-based Q-switched erbium-doped fiber laser using fiber Bragg grating,” J. Mod. Opt. 60, 202–212 (2013).
    [Crossref]
  7. D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett. 98, 073106 (2011).
    [Crossref]
  8. D. P. Zhou, L. Wei, and W. K. Liu, “Tunable graphene Q-switched erbium-doped fiber laser with suppressed self-mode locking effect,” Appl. Opt. 51, 2554–2558 (2012).
    [Crossref]
  9. Y. K. Yap, R. M. D. L. Rue, C. H. Pua, S. W. Harun, and H. Ahmad, “Graphene-based Q-switched pulsed fiber laser in a linear configuration,” Chin. Opt. Lett. 10, 041405 (2012).
    [Crossref]
  10. Y. L. Tang, X. C. Yu, X. H. Li, Z. Y. Yan, and Q. J. Wang, “High power thulium fiber laser Q-switched with single-layer graphene,” Opt. Lett. 39, 614–617 (2014).
    [Crossref]
  11. J. Liu, J. Xu, and P. Wang, “Graphene-based passively Q-switched 2  μm thulium-doped fiber laser,” Opt. Commun. 285, 5319–5322 (2012).
    [Crossref]
  12. L. Wei, D. P. Zhou, H. Y. Fan, and W. K. Liu, “Graphene-based Q-switched erbium-doped fiber laser with wide pulse-repetition-rate range,” IEEE Photon. Technol. Lett. 24, 309–311 (2012).
    [Crossref]
  13. Z. Z. Dong, H. P. Li, H. D. Xia, Y. Liu, Z. G. Wang, and Y. F. Chen, “Passively Q-switched erbium-doped fiber laser using a graphene saturable absorber,” in Asia Communications and Photonics Conference (Optical Society of America, 2012), paper AS1A.2.
  14. D. Lv, L. H. P. Li, H. D. Xia, S. J. Zhang, and Y. Liu, “Passively Q-switched linear-cavity erbium-doped fiber laser based on graphene saturable absorber,” in 12th International Conference on Optical Communications and Networks (ICOCN) (IEEE, 2013), pp. 1–3.
  15. L. Q. Zhang, Z. Zhuo, J. X. Wang, and Y. Z. Wang, “Passively Q-switched fiber laser based on graphene saturable absorber,” Laser Phys. 22, 433–436 (2012).
    [Crossref]
  16. G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
    [Crossref]
  17. J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
    [Crossref]
  18. Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched Erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photon. J. 4, 869–876 (2012).
    [Crossref]
  19. H. Ahmad, F. D. Muhammad, M. Z. Zulkifli, and S. W. Harun, “Q-switched pulse generation from an all-fiber distributed Bragg reflector laser using graphene as saturable absorber,” Chin. Opt. Lett. 11, 071401 (2013).
    [Crossref]
  20. J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
    [Crossref]
  21. Z. Q. Luo, M. Zhou, J. Weng, G. M. Huang, H. Y. Xu, C. C. Ye, and Z. P. Cai, “Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser,” Opt. Lett. 35, 3709–3711 (2010).
    [Crossref]
  22. Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
    [Crossref]
  23. C. Wei, X. S. Zhu, F. Wang, Y. Xu, K. Balakrishnan, F. Song, R. A. Norwood, and N. Peyghambarian, “Graphene Q-switched 2.78  μm Er3+-doped fluoride fiber laser,” Opt. Lett. 38, 3233–3236 (2013).
    [Crossref]
  24. J. Liu, S. D. Wu, Q. H. Yang, and P. Wang, “Stable nanosecond pulse generation from a graphene-based passively Q-switched Yb-doped fiber laser,” Opt. Lett. 36, 4008–4010 (2011).
    [Crossref]
  25. L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).
  26. G. W. Zhu, X. S. Zhu, K. Balakrishnan, R. A. Norwood, and N. Peyghambarian, “Fe2+:ZnSe and graphene Q-switched singly Ho3+-doped ZBLAN fiber lasers at 3  μm,” Opt. Mater. Express 3, 1365–1377 (2013).
    [Crossref]
  27. F. Wang, F. Torrisi, Z. Jiang, D. Popa, T. Hasan, Z. Sun, W. B. Cho, and A. C. Ferrari, “Graphene passively Q-switched two-micron fiber lasers,” in CLEO: Science and Innovations (Optical Society of America, 2012), paper JW2A.72.
  28. 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,” Sci. Mag. 320(5881), 1308 (2008).
    [Crossref]
  29. 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).
    [Crossref]
  30. X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
    [Crossref]
  31. A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
    [Crossref]
  32. D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single-and few-layer graphene,” Nano Lett. 7, 238–242 (2007).
    [Crossref]

2014 (2)

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

Y. L. Tang, X. C. Yu, X. H. Li, Z. Y. Yan, and Q. J. Wang, “High power thulium fiber laser Q-switched with single-layer graphene,” Opt. Lett. 39, 614–617 (2014).
[Crossref]

2013 (5)

2012 (11)

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

D. P. Zhou, L. Wei, and W. K. Liu, “Tunable graphene Q-switched erbium-doped fiber laser with suppressed self-mode locking effect,” Appl. Opt. 51, 2554–2558 (2012).
[Crossref]

Y. K. Yap, R. M. D. L. Rue, C. H. Pua, S. W. Harun, and H. Ahmad, “Graphene-based Q-switched pulsed fiber laser in a linear configuration,” Chin. Opt. Lett. 10, 041405 (2012).
[Crossref]

W. J. Cao, H. Y. Wang, A. P. Luo, Z. C. Luo, and W. C. Xu, “Graphene-based, 50  nm wide-band tunable passively Q-switched fiber laser,” Laser Phys. Lett. 9, 54–58 (2012).
[Crossref]

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

J. Liu, J. Xu, and P. Wang, “Graphene-based passively Q-switched 2  μm thulium-doped fiber laser,” Opt. Commun. 285, 5319–5322 (2012).
[Crossref]

L. Wei, D. P. Zhou, H. Y. Fan, and W. K. Liu, “Graphene-based Q-switched erbium-doped fiber laser with wide pulse-repetition-rate range,” IEEE Photon. Technol. Lett. 24, 309–311 (2012).
[Crossref]

L. Q. Zhang, Z. Zhuo, J. X. Wang, and Y. Z. Wang, “Passively Q-switched fiber laser based on graphene saturable absorber,” Laser Phys. 22, 433–436 (2012).
[Crossref]

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
[Crossref]

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched Erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photon. J. 4, 869–876 (2012).
[Crossref]

2011 (3)

J. Liu, S. D. Wu, Q. H. Yang, and P. Wang, “Stable nanosecond pulse generation from a graphene-based passively Q-switched Yb-doped fiber laser,” Opt. Lett. 36, 4008–4010 (2011).
[Crossref]

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett. 98, 073106 (2011).
[Crossref]

Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
[Crossref]

2010 (2)

D. P. Zhou, L. Wei, B. Dong, and W. K. Liu, “Tunable passively Q-switched erbium-doped fiber laser with carbon nanotubes as a saturable absorber,” IEEE Photon. Technol. Lett. 22, 9–11 (2010).
[Crossref]

Z. Q. Luo, M. Zhou, J. Weng, G. M. Huang, H. Y. Xu, C. C. Ye, and Z. P. Cai, “Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser,” Opt. Lett. 35, 3709–3711 (2010).
[Crossref]

2009 (3)

J. Y. Huang, W. C. Huang, W. Z. Zhuang, K. W. Su, Y. F. Chen, and K. F. Huang, “High-pulse-energy, passively Q-switched Yb-doped fiber laser with AlGaInAs quantum wells as a saturable absorber,” Opt. Lett. 34, 2360–2362 (2009).
[Crossref]

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).
[Crossref]

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

2008 (1)

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,” Sci. Mag. 320(5881), 1308 (2008).
[Crossref]

2007 (1)

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single-and few-layer graphene,” Nano Lett. 7, 238–242 (2007).
[Crossref]

2006 (1)

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

Abramski, K. M.

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
[Crossref]

Ahmad, H.

An, J.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Balakrishnan, K.

Banerjee, S. K.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

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).
[Crossref]

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,” Sci. Mag. 320(5881), 1308 (2008).
[Crossref]

Blau, W. J.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

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,” Sci. Mag. 320(5881), 1308 (2008).
[Crossref]

Cai, W. W.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Cai, Z. P.

Z. Q. Luo, Y. Z. Huang, J. Weng, H. H. Cheng, Z. Q. Lin, B. Xu, Z. P. Cai, and H. Y. Xu, “1.06  μm Q-switched ytterbium-doped fiber laser using few-layer topological insulator Bi2Se3 as a saturable absorber,” Opt. Express 21, 29516–29522 (2013).
[Crossref]

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
[Crossref]

Z. Q. Luo, M. Zhou, J. Weng, G. M. Huang, H. Y. Xu, C. C. Ye, and Z. P. Cai, “Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser,” Opt. Lett. 35, 3709–3711 (2010).
[Crossref]

Cao, W. J.

W. J. Cao, H. Y. Wang, A. P. Luo, Z. C. Luo, and W. C. Xu, “Graphene-based, 50  nm wide-band tunable passively Q-switched fiber laser,” Laser Phys. Lett. 9, 54–58 (2012).
[Crossref]

Casiraghi, C.

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

Chen, L. J.

Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
[Crossref]

Chen, S. Q.

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

Chen, Y.

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched Erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photon. J. 4, 869–876 (2012).
[Crossref]

Chen, Y. F.

J. Y. Huang, W. C. Huang, W. Z. Zhuang, K. W. Su, Y. F. Chen, and K. F. Huang, “High-pulse-energy, passively Q-switched Yb-doped fiber laser with AlGaInAs quantum wells as a saturable absorber,” Opt. Lett. 34, 2360–2362 (2009).
[Crossref]

Z. Z. Dong, H. P. Li, H. D. Xia, Y. Liu, Z. G. Wang, and Y. F. Chen, “Passively Q-switched erbium-doped fiber laser using a graphene saturable absorber,” in Asia Communications and Photonics Conference (Optical Society of America, 2012), paper AS1A.2.

Cheng, H. H.

Z. Q. Luo, Y. Z. Huang, J. Weng, H. H. Cheng, Z. Q. Lin, B. Xu, Z. P. Cai, and H. Y. Xu, “1.06  μm Q-switched ytterbium-doped fiber laser using few-layer topological insulator Bi2Se3 as a saturable absorber,” Opt. Express 21, 29516–29522 (2013).
[Crossref]

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

Cheng, J. Q.

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Cho, W. B.

F. Wang, F. Torrisi, Z. Jiang, D. Popa, T. Hasan, Z. Sun, W. B. Cho, and A. C. Ferrari, “Graphene passively Q-switched two-micron fiber lasers,” in CLEO: Science and Innovations (Optical Society of America, 2012), paper JW2A.72.

Coleman, J. N.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Colombo, L.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Dong, B.

D. P. Zhou, L. Wei, B. Dong, and W. K. Liu, “Tunable passively Q-switched erbium-doped fiber laser with carbon nanotubes as a saturable absorber,” IEEE Photon. Technol. Lett. 22, 9–11 (2010).
[Crossref]

Dong, J.

Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
[Crossref]

Dong, Z. Z.

Z. Z. Dong, H. P. Li, H. D. Xia, Y. Liu, Z. G. Wang, and Y. F. Chen, “Passively Q-switched erbium-doped fiber laser using a graphene saturable absorber,” in Asia Communications and Photonics Conference (Optical Society of America, 2012), paper AS1A.2.

Du, G. G.

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Du, J.

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

Ensslin, K.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single-and few-layer graphene,” Nano Lett. 7, 238–242 (2007).
[Crossref]

Fan, H. Y.

L. Wei, D. P. Zhou, H. Y. Fan, and W. K. Liu, “Graphene-based Q-switched erbium-doped fiber laser with wide pulse-repetition-rate range,” IEEE Photon. Technol. Lett. 24, 309–311 (2012).
[Crossref]

Fan, J. T.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Feng, Y.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Ferrari, A. C.

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett. 98, 073106 (2011).
[Crossref]

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

F. Wang, F. Torrisi, Z. Jiang, D. Popa, T. Hasan, Z. Sun, W. B. Cho, and A. C. Ferrari, “Graphene passively Q-switched two-micron fiber lasers,” in CLEO: Science and Innovations (Optical Society of America, 2012), paper JW2A.72.

Fu, H. Y.

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

Geim, A. K.

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,” Sci. Mag. 320(5881), 1308 (2008).
[Crossref]

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

Graf, D.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single-and few-layer graphene,” Nano Lett. 7, 238–242 (2007).
[Crossref]

Grigorenko, A. N.

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,” Sci. Mag. 320(5881), 1308 (2008).
[Crossref]

Harun, S. W.

Hasan, T.

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett. 98, 073106 (2011).
[Crossref]

F. Wang, F. Torrisi, Z. Jiang, D. Popa, T. Hasan, Z. Sun, W. B. Cho, and A. C. Ferrari, “Graphene passively Q-switched two-micron fiber lasers,” in CLEO: Science and Innovations (Optical Society of America, 2012), paper JW2A.72.

Hierold, C.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single-and few-layer graphene,” Nano Lett. 7, 238–242 (2007).
[Crossref]

Hu, J. M.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Huang, G. M.

Huang, J. Y.

Huang, K. F.

Huang, W. C.

Huang, Y. Z.

Jagiello, J.

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
[Crossref]

Jiang, D.

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

Jiang, G. B.

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

Jiang, Z.

F. Wang, F. Torrisi, Z. Jiang, D. Popa, T. Hasan, Z. Sun, W. B. Cho, and A. C. Ferrari, “Graphene passively Q-switched two-micron fiber lasers,” in CLEO: Science and Innovations (Optical Society of America, 2012), paper JW2A.72.

Jung, I.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Jungen, A.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single-and few-layer graphene,” Nano Lett. 7, 238–242 (2007).
[Crossref]

Kim, S.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Kozinski, R.

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
[Crossref]

Lazzeri, M.

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

Li, H. P.

Z. Z. Dong, H. P. Li, H. D. Xia, Y. Liu, Z. G. Wang, and Y. F. Chen, “Passively Q-switched erbium-doped fiber laser using a graphene saturable absorber,” in Asia Communications and Photonics Conference (Optical Society of America, 2012), paper AS1A.2.

Li, L. H. P.

D. Lv, L. H. P. Li, H. D. Xia, S. J. Zhang, and Y. Liu, “Passively Q-switched linear-cavity erbium-doped fiber laser based on graphene saturable absorber,” in 12th International Conference on Optical Communications and Networks (ICOCN) (IEEE, 2013), pp. 1–3.

Li, R. H.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Li, X. H.

Li, X. S.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Librant, K.

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
[Crossref]

Lin, Z. Q.

Lipinska, L.

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
[Crossref]

Liu, J.

J. Liu, J. Xu, and P. Wang, “Graphene-based passively Q-switched 2  μm thulium-doped fiber laser,” Opt. Commun. 285, 5319–5322 (2012).
[Crossref]

J. Liu, S. D. Wu, Q. H. Yang, and P. Wang, “Stable nanosecond pulse generation from a graphene-based passively Q-switched Yb-doped fiber laser,” Opt. Lett. 36, 4008–4010 (2011).
[Crossref]

Liu, W. K.

L. Wei, D. P. Zhou, H. Y. Fan, and W. K. Liu, “Graphene-based Q-switched erbium-doped fiber laser with wide pulse-repetition-rate range,” IEEE Photon. Technol. Lett. 24, 309–311 (2012).
[Crossref]

D. P. Zhou, L. Wei, and W. K. Liu, “Tunable graphene Q-switched erbium-doped fiber laser with suppressed self-mode locking effect,” Appl. Opt. 51, 2554–2558 (2012).
[Crossref]

D. P. Zhou, L. Wei, B. Dong, and W. K. Liu, “Tunable passively Q-switched erbium-doped fiber laser with carbon nanotubes as a saturable absorber,” IEEE Photon. Technol. Lett. 22, 9–11 (2010).
[Crossref]

Liu, Y.

D. Lv, L. H. P. Li, H. D. Xia, S. J. Zhang, and Y. Liu, “Passively Q-switched linear-cavity erbium-doped fiber laser based on graphene saturable absorber,” in 12th International Conference on Optical Communications and Networks (ICOCN) (IEEE, 2013), pp. 1–3.

Z. Z. Dong, H. P. Li, H. D. Xia, Y. Liu, Z. G. Wang, and Y. F. Chen, “Passively Q-switched erbium-doped fiber laser using a graphene saturable absorber,” in Asia Communications and Photonics Conference (Optical Society of America, 2012), paper AS1A.2.

Loh, K. P.

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).
[Crossref]

Lotya, M.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Luo, A. P.

W. J. Cao, H. Y. Wang, A. P. Luo, Z. C. Luo, and W. C. Xu, “Graphene-based, 50  nm wide-band tunable passively Q-switched fiber laser,” Laser Phys. Lett. 9, 54–58 (2012).
[Crossref]

Luo, J.

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Luo, Z. C.

W. J. Cao, H. Y. Wang, A. P. Luo, Z. C. Luo, and W. C. Xu, “Graphene-based, 50  nm wide-band tunable passively Q-switched fiber laser,” Laser Phys. Lett. 9, 54–58 (2012).
[Crossref]

Luo, Z. Q.

Z. Q. Luo, Y. Z. Huang, J. Weng, H. H. Cheng, Z. Q. Lin, B. Xu, Z. P. Cai, and H. Y. Xu, “1.06  μm Q-switched ytterbium-doped fiber laser using few-layer topological insulator Bi2Se3 as a saturable absorber,” Opt. Express 21, 29516–29522 (2013).
[Crossref]

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
[Crossref]

Z. Q. Luo, M. Zhou, J. Weng, G. M. Huang, H. Y. Xu, C. C. Ye, and Z. P. Cai, “Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser,” Opt. Lett. 35, 3709–3711 (2010).
[Crossref]

Lv, D.

D. Lv, L. H. P. Li, H. D. Xia, S. J. Zhang, and Y. Liu, “Passively Q-switched linear-cavity erbium-doped fiber laser based on graphene saturable absorber,” in 12th International Conference on Optical Communications and Networks (ICOCN) (IEEE, 2013), pp. 1–3.

Mauri, F.

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

Meyer, J. C.

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

Molitor, F.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single-and few-layer graphene,” Nano Lett. 7, 238–242 (2007).
[Crossref]

Muhammad, F. D.

H. Ahmad, M. Z. Zulkifli, F. D. Muhammad, A. Z. Zulkifli, and S. W. Harun, “Tunable graphene-based Q-switched erbium-doped fiber laser using fiber Bragg grating,” J. Mod. Opt. 60, 202–212 (2013).
[Crossref]

H. Ahmad, F. D. Muhammad, M. Z. Zulkifli, and S. W. Harun, “Q-switched pulse generation from an all-fiber distributed Bragg reflector laser using graphene as saturable absorber,” Chin. Opt. Lett. 11, 071401 (2013).
[Crossref]

Nah, J.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Nair, R. 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,” Sci. Mag. 320(5881), 1308 (2008).
[Crossref]

Ni, Z. H.

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).
[Crossref]

Norwood, R. A.

Novoselov, K. S.

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,” Sci. Mag. 320(5881), 1308 (2008).
[Crossref]

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

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,” Sci. Mag. 320(5881), 1308 (2008).
[Crossref]

Peyghambarian, N.

Piner, R.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Piscanec, S.

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

Popa, D.

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett. 98, 073106 (2011).
[Crossref]

F. Wang, F. Torrisi, Z. Jiang, D. Popa, T. Hasan, Z. Sun, W. B. Cho, and A. C. Ferrari, “Graphene passively Q-switched two-micron fiber lasers,” in CLEO: Science and Innovations (Optical Society of America, 2012), paper JW2A.72.

Pua, C. H.

Qi, W.

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

Roth, S.

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

Ruan, S. C.

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Rue, R. M. D. L.

Ruoff, R. S.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Scardaci, V.

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

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).
[Crossref]

Sobon, G.

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
[Crossref]

Song, F.

Sotor, J.

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
[Crossref]

Stampfer, C.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single-and few-layer graphene,” Nano Lett. 7, 238–242 (2007).
[Crossref]

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,” Sci. Mag. 320(5881), 1308 (2008).
[Crossref]

Su, K. W.

Sun, Z.

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett. 98, 073106 (2011).
[Crossref]

F. Wang, F. Torrisi, Z. Jiang, D. Popa, T. Hasan, Z. Sun, W. B. Cho, and A. C. Ferrari, “Graphene passively Q-switched two-micron fiber lasers,” in CLEO: Science and Innovations (Optical Society of America, 2012), paper JW2A.72.

Tang, D. Y.

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

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).
[Crossref]

Tang, P. H.

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

Tang, Y. L.

Torrisi, F.

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett. 98, 073106 (2011).
[Crossref]

F. Wang, F. Torrisi, Z. Jiang, D. Popa, T. Hasan, Z. Sun, W. B. Cho, and A. C. Ferrari, “Graphene passively Q-switched two-micron fiber lasers,” in CLEO: Science and Innovations (Optical Society of America, 2012), paper JW2A.72.

Tutuc, E.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Velamakanni, A.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Wang, F.

C. Wei, X. S. Zhu, F. Wang, Y. Xu, K. Balakrishnan, F. Song, R. A. Norwood, and N. Peyghambarian, “Graphene Q-switched 2.78  μm Er3+-doped fluoride fiber laser,” Opt. Lett. 38, 3233–3236 (2013).
[Crossref]

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett. 98, 073106 (2011).
[Crossref]

F. Wang, F. Torrisi, Z. Jiang, D. Popa, T. Hasan, Z. Sun, W. B. Cho, and A. C. Ferrari, “Graphene passively Q-switched two-micron fiber lasers,” in CLEO: Science and Innovations (Optical Society of America, 2012), paper JW2A.72.

Wang, G. Z.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Wang, H. Y.

W. J. Cao, H. Y. Wang, A. P. Luo, Z. C. Luo, and W. C. Xu, “Graphene-based, 50  nm wide-band tunable passively Q-switched fiber laser,” Laser Phys. Lett. 9, 54–58 (2012).
[Crossref]

Wang, J.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Wang, J. H.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Wang, J. X.

L. Q. Zhang, Z. Zhuo, J. X. Wang, and Y. Z. Wang, “Passively Q-switched fiber laser based on graphene saturable absorber,” Laser Phys. 22, 433–436 (2012).
[Crossref]

Wang, J. Z.

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

Wang, P.

J. Liu, J. Xu, and P. Wang, “Graphene-based passively Q-switched 2  μm thulium-doped fiber laser,” Opt. Commun. 285, 5319–5322 (2012).
[Crossref]

J. Liu, S. D. Wu, Q. H. Yang, and P. Wang, “Stable nanosecond pulse generation from a graphene-based passively Q-switched Yb-doped fiber laser,” Opt. Lett. 36, 4008–4010 (2011).
[Crossref]

Wang, Q. J.

Wang, 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).
[Crossref]

Wang, Y. Z.

L. Q. Zhang, Z. Zhuo, J. X. Wang, and Y. Z. Wang, “Passively Q-switched fiber laser based on graphene saturable absorber,” Laser Phys. 22, 433–436 (2012).
[Crossref]

Wang, Z. G.

Z. Z. Dong, H. P. Li, H. D. Xia, Y. Liu, Z. G. Wang, and Y. F. Chen, “Passively Q-switched erbium-doped fiber laser using a graphene saturable absorber,” in Asia Communications and Photonics Conference (Optical Society of America, 2012), paper AS1A.2.

Wang, Z. T.

Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched Erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photon. J. 4, 869–876 (2012).
[Crossref]

Wei, C.

Wei, H. F.

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Wei, L.

L. Wei, D. P. Zhou, H. Y. Fan, and W. K. Liu, “Graphene-based Q-switched erbium-doped fiber laser with wide pulse-repetition-rate range,” IEEE Photon. Technol. Lett. 24, 309–311 (2012).
[Crossref]

D. P. Zhou, L. Wei, and W. K. Liu, “Tunable graphene Q-switched erbium-doped fiber laser with suppressed self-mode locking effect,” Appl. Opt. 51, 2554–2558 (2012).
[Crossref]

D. P. Zhou, L. Wei, B. Dong, and W. K. Liu, “Tunable passively Q-switched erbium-doped fiber laser with carbon nanotubes as a saturable absorber,” IEEE Photon. Technol. Lett. 22, 9–11 (2010).
[Crossref]

Wen, S. C.

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched Erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photon. J. 4, 869–876 (2012).
[Crossref]

Weng, J.

Wirtz, L.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single-and few-layer graphene,” Nano Lett. 7, 238–242 (2007).
[Crossref]

Wu, D. D.

Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
[Crossref]

Wu, S. D.

Xia, H. D.

Z. Z. Dong, H. P. Li, H. D. Xia, Y. Liu, Z. G. Wang, and Y. F. Chen, “Passively Q-switched erbium-doped fiber laser using a graphene saturable absorber,” in Asia Communications and Photonics Conference (Optical Society of America, 2012), paper AS1A.2.

D. Lv, L. H. P. Li, H. D. Xia, S. J. Zhang, and Y. Liu, “Passively Q-switched linear-cavity erbium-doped fiber laser based on graphene saturable absorber,” in 12th International Conference on Optical Communications and Networks (ICOCN) (IEEE, 2013), pp. 1–3.

Xu, B.

Xu, H. Y.

Z. Q. Luo, Y. Z. Huang, J. Weng, H. H. Cheng, Z. Q. Lin, B. Xu, Z. P. Cai, and H. Y. Xu, “1.06  μm Q-switched ytterbium-doped fiber laser using few-layer topological insulator Bi2Se3 as a saturable absorber,” Opt. Express 21, 29516–29522 (2013).
[Crossref]

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
[Crossref]

Z. Q. Luo, M. Zhou, J. Weng, G. M. Huang, H. Y. Xu, C. C. Ye, and Z. P. Cai, “Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser,” Opt. Lett. 35, 3709–3711 (2010).
[Crossref]

Xu, J.

J. Liu, J. Xu, and P. Wang, “Graphene-based passively Q-switched 2  μm thulium-doped fiber laser,” Opt. Commun. 285, 5319–5322 (2012).
[Crossref]

Xu, W. C.

W. J. Cao, H. Y. Wang, A. P. Luo, Z. C. Luo, and W. C. Xu, “Graphene-based, 50  nm wide-band tunable passively Q-switched fiber laser,” Laser Phys. Lett. 9, 54–58 (2012).
[Crossref]

Xu, Y.

Yan, P. G.

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Yan, Y. 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).
[Crossref]

Yan, Z. Y.

Yang, D. X.

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Yang, Q. H.

Yap, Y. K.

Ye, C. C.

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
[Crossref]

Z. Q. Luo, M. Zhou, J. Weng, G. M. Huang, H. Y. Xu, C. C. Ye, and Z. P. Cai, “Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser,” Opt. Lett. 35, 3709–3711 (2010).
[Crossref]

Yu, X. C.

Yu, Y. Q.

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Zdrojek, M.

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
[Crossref]

Zhang, G. L.

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Zhang, H.

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched Erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photon. J. 4, 869–876 (2012).
[Crossref]

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).
[Crossref]

Zhang, L.

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Zhang, L. Q.

L. Q. Zhang, Z. Zhuo, J. X. Wang, and Y. Z. Wang, “Passively Q-switched fiber laser based on graphene saturable absorber,” Laser Phys. 22, 433–436 (2012).
[Crossref]

Zhang, S. J.

D. Lv, L. H. P. Li, H. D. Xia, S. J. Zhang, and Y. Liu, “Passively Q-switched linear-cavity erbium-doped fiber laser based on graphene saturable absorber,” in 12th International Conference on Optical Communications and Networks (ICOCN) (IEEE, 2013), pp. 1–3.

Zhao, C. J.

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched Erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photon. J. 4, 869–876 (2012).
[Crossref]

Zhao, J. Q.

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Zhou, D. P.

L. Wei, D. P. Zhou, H. Y. Fan, and W. K. Liu, “Graphene-based Q-switched erbium-doped fiber laser with wide pulse-repetition-rate range,” IEEE Photon. Technol. Lett. 24, 309–311 (2012).
[Crossref]

D. P. Zhou, L. Wei, and W. K. Liu, “Tunable graphene Q-switched erbium-doped fiber laser with suppressed self-mode locking effect,” Appl. Opt. 51, 2554–2558 (2012).
[Crossref]

D. P. Zhou, L. Wei, B. Dong, and W. K. Liu, “Tunable passively Q-switched erbium-doped fiber laser with carbon nanotubes as a saturable absorber,” IEEE Photon. Technol. Lett. 22, 9–11 (2010).
[Crossref]

Zhou, M.

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
[Crossref]

Z. Q. Luo, M. Zhou, J. Weng, G. M. Huang, H. Y. Xu, C. C. Ye, and Z. P. Cai, “Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser,” Opt. Lett. 35, 3709–3711 (2010).
[Crossref]

Zhu, G. W.

Zhu, X. S.

Zhuang, W. Z.

Zhuo, Z.

L. Q. Zhang, Z. Zhuo, J. X. Wang, and Y. Z. Wang, “Passively Q-switched fiber laser based on graphene saturable absorber,” Laser Phys. 22, 433–436 (2012).
[Crossref]

Zulkifli, A. Z.

H. Ahmad, M. Z. Zulkifli, F. D. Muhammad, A. Z. Zulkifli, and S. W. Harun, “Tunable graphene-based Q-switched erbium-doped fiber laser using fiber Bragg grating,” J. Mod. Opt. 60, 202–212 (2013).
[Crossref]

Zulkifli, M. Z.

H. Ahmad, M. Z. Zulkifli, F. D. Muhammad, A. Z. Zulkifli, and S. W. Harun, “Tunable graphene-based Q-switched erbium-doped fiber laser using fiber Bragg grating,” J. Mod. Opt. 60, 202–212 (2013).
[Crossref]

H. Ahmad, F. D. Muhammad, M. Z. Zulkifli, and S. W. Harun, “Q-switched pulse generation from an all-fiber distributed Bragg reflector laser using graphene as saturable absorber,” Chin. Opt. Lett. 11, 071401 (2013).
[Crossref]

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).
[Crossref]

Appl. Opt. (1)

Appl. Phys. Lett. (2)

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett. 98, 073106 (2011).
[Crossref]

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett. 101, 241106 (2012).
[Crossref]

Chin. Opt. Lett. (2)

IEEE J. Lightwave Technol. (1)

Z. Q. Luo, M. Zhou, D. D. Wu, C. C. Ye, J. Weng, J. Dong, H. Y. Xu, Z. P. Cai, and L. J. Chen, “Graphene-induced nonlinear four-wave-mixing and its application to multiwavelength Q-switched rare-earth-doped fiber lasers,” IEEE J. Lightwave Technol. 29, 2732–2739 (2011).
[Crossref]

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

Y. Chen, C. J. Zhao, S. Q. Chen, J. Du, P. H. Tang, G. B. Jiang, H. Zhang, S. C. Wen, and D. Y. Tang, “Large energy, wavelength widely tunable, topological insulator Q-switched erbium-doped fiber laser,” IEEE J. Sel. Top. Quantum Electron. 20, 0900508 (2014).

IEEE Photon. J. (2)

Z. T. Wang, Y. Chen, C. J. Zhao, H. Zhang, and S. C. Wen, “Switchable dual-wavelength synchronously Q-switched Erbium-doped fiber laser based on graphene saturable absorber,” IEEE Photon. J. 4, 869–876 (2012).
[Crossref]

J. Z. Wang, Z. Q. Luo, M. Zhou, C. C. Ye, H. Y. Fu, Z. P. Cai, H. H. Cheng, H. Y. Xu, and W. Qi, “Evanescent-light deposition of graphene onto tapered fibers for passive Q-switch and mode-locker,” IEEE Photon. J. 4, 1295–1305 (2012).
[Crossref]

IEEE Photon. Technol. Lett. (2)

L. Wei, D. P. Zhou, H. Y. Fan, and W. K. Liu, “Graphene-based Q-switched erbium-doped fiber laser with wide pulse-repetition-rate range,” IEEE Photon. Technol. Lett. 24, 309–311 (2012).
[Crossref]

D. P. Zhou, L. Wei, B. Dong, and W. K. Liu, “Tunable passively Q-switched erbium-doped fiber laser with carbon nanotubes as a saturable absorber,” IEEE Photon. Technol. Lett. 22, 9–11 (2010).
[Crossref]

J. Mod. Opt. (1)

H. Ahmad, M. Z. Zulkifli, F. D. Muhammad, A. Z. Zulkifli, and S. W. Harun, “Tunable graphene-based Q-switched erbium-doped fiber laser using fiber Bragg grating,” J. Mod. Opt. 60, 202–212 (2013).
[Crossref]

Laser Phys. (1)

L. Q. Zhang, Z. Zhuo, J. X. Wang, and Y. Z. Wang, “Passively Q-switched fiber laser based on graphene saturable absorber,” Laser Phys. 22, 433–436 (2012).
[Crossref]

Laser Phys. Lett. (2)

W. J. Cao, H. Y. Wang, A. P. Luo, Z. C. Luo, and W. C. Xu, “Graphene-based, 50  nm wide-band tunable passively Q-switched fiber laser,” Laser Phys. Lett. 9, 54–58 (2012).
[Crossref]

L. Zhang, J. T. Fan, J. H. Wang, J. M. Hu, M. Lotya, G. Z. Wang, R. H. Li, L. Zhang, W. J. Blau, J. N. Coleman, J. Wang, and Y. Feng, “Graphene incorporated Q-switching of a polarization-maintaining Yb-doped fiber laser,” Laser Phys. Lett. 9, 888–892 (2012).

Nano Lett. (1)

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single-and few-layer graphene,” Nano Lett. 7, 238–242 (2007).
[Crossref]

Opt. Commun. (1)

J. Liu, J. Xu, and P. Wang, “Graphene-based passively Q-switched 2  μm thulium-doped fiber laser,” Opt. Commun. 285, 5319–5322 (2012).
[Crossref]

Opt. Eng. (1)

J. Q. Zhao, P. G. Yan, S. C. Ruan, Y. Q. Yu, G. G. Du, G. L. Zhang, J. Q. Cheng, H. F. Wei, and J. Luo, “Multi-wavelength graphene-based Q-switched erbium-doped fiber laser,” Opt. Eng. 51, 074201 (2012).
[Crossref]

Opt. Express (1)

Opt. Lett. (5)

Opt. Mater. Express (1)

Phys. Rev. Lett. (1)

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett. 97, 187401 (2006).
[Crossref]

Sci. Mag. (2)

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,” Sci. Mag. 320(5881), 1308 (2008).
[Crossref]

X. S. Li, W. W. Cai, J. An, S. Kim, J. Nah, D. X. Yang, R. Piner, A. Velamakanni, I. Jung, E. Tutuc, S. K. Banerjee, L. Colombo, and R. S. Ruoff, “Large-area synthesis of high-quality and uniform graphene films on copper foils,” Sci. Mag. 324(5932), 1312–1314 (2009).
[Crossref]

Other (3)

F. Wang, F. Torrisi, Z. Jiang, D. Popa, T. Hasan, Z. Sun, W. B. Cho, and A. C. Ferrari, “Graphene passively Q-switched two-micron fiber lasers,” in CLEO: Science and Innovations (Optical Society of America, 2012), paper JW2A.72.

Z. Z. Dong, H. P. Li, H. D. Xia, Y. Liu, Z. G. Wang, and Y. F. Chen, “Passively Q-switched erbium-doped fiber laser using a graphene saturable absorber,” in Asia Communications and Photonics Conference (Optical Society of America, 2012), paper AS1A.2.

D. Lv, L. H. P. Li, H. D. Xia, S. J. Zhang, and Y. Liu, “Passively Q-switched linear-cavity erbium-doped fiber laser based on graphene saturable absorber,” in 12th International Conference on Optical Communications and Networks (ICOCN) (IEEE, 2013), pp. 1–3.

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Figures (7)

Fig. 1.
Fig. 1. Raman spectrum of graphene with photograph of the PMMA/graphene fiber ferrule.
Fig. 2.
Fig. 2. Schematic of the EYDCF Q-switched fiber laser.
Fig. 3.
Fig. 3. Spectra of wavelength-tunable Q-switched operation.
Fig. 4.
Fig. 4. Output pulse train at different wavelengths: (a) 1546.92 nm, (b) 1541.35 nm, (c) 1535.52 nm, and (d) 1530.97 nm.
Fig. 5.
Fig. 5. Output average power and pulse energy at different wavelengths within tuning range.
Fig. 6.
Fig. 6. (a) Output spectrum and Q-switched pulse train (inset). (b) Radio-frequency optical spectrum at the fundamental frequency and the wideband RF spectrum (insert).
Fig. 7.
Fig. 7. (a) Pulse repetition rate and average output power. (b) Single pulse energy and pulsewidth as a function of the launched pump power.

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