Abstract

We present a high-average-power green laser based on second harmonic conversion of a laser diode-pumped master oscillator Nd:YAG power amplifier system. The power amplifier chain includes a stimulated Brillouin scattering (SBS) cell that was used a phase-conjugate mirror to double-pass scheme. That suppresses the thermal phase distortion and compresses the pulse duration. The fundamental beam output power was 670 W with a pulse width of 7.9 ns. A second harmonic power of 335 W with a 4.8-ns pulse width and 80-mJ pulse energy was produced using a LiB3O5 (LBO) crystal.

© 2016 Optical Society of America

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References

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  1. T. Kojima, K. Furuta, M. Kurosawa, and J. Nishimae, “400-W Diode-Pumped Solid-State Green Laser,” inConference on Lasers and Electro-Optics/Pacific Rim, 280–281 (2005).
  2. M. Poulter, N. Hay, P. C. Ben Fulford, and M. Mason, “Q-switched Nd:YAG lasers for high average-power and high peak-power operation,” Proc. SPIE 7193, 719309 (2009).
    [Crossref]
  3. R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
    [Crossref]
  4. H. Kiriyama, K. Yamakawa, T. Nagai, N. Kageyama, H. Miyajima, H. Kan, H. Yoshida, and M. Nakatsuka, “360-W average power operation with a single-stage diode-pumped Nd:YAG amplifier at a 1-kHz repetition rate,” Opt. Lett. 28(18), 1671–1673 (2003).
    [Crossref] [PubMed]
  5. T. Riesbeck, E. Risse, and H. J. Eichler, “Pulsed solid-state laser system with fiber phase conjugation and 315Waverage output power,” Appl. Phys. B 73(8), 847–849 (2001).
    [Crossref]
  6. T. Riesbeck and H. J. Eichler, “A high power laser system at 540 nm with beam coupling by second harmonic generation,” Opt. Commun. 275(2), 429–432 (2007).
    [Crossref]
  7. J.-P. Negel, A. Loescher, A. Voss, D. Bauer, D. Sutter, A. Killi, M. A. Ahmed, and T. Graf, “Ultrafast thin-disk multipass laser amplifier delivering 1.4 kW (4.7 mJ, 1030 nm) average power converted to 820 W at 515 nm and 234 W at 343 nm,” Opt. Express 23(16), 21064–21077 (2015).
    [Crossref] [PubMed]
  8. R. Bhushan, K. Tsubakimoto, H. Yoshida, H. Fujita, and M. Nakatsuka, “Thermally Induced Birefringence Compensation in High Average Power Nd:YAG Laser,” Jpn. J. Appl. Phys. 46(3A), 1051–1053 (2007).
    [Crossref]
  9. H. Yoshida, V. Kmetik, H. Fujita, M. Nakatsuka, T. Yamanaka, and K. Yoshida, “Heavy fluorocarbon liquids for a phase-conjugated stimulated Brillouin scattering mirror,” Appl. Opt. 36(16), 3739–3744 (1997).
    [Crossref] [PubMed]
  10. I. D. Carr and D. C. Hanna, “Performance of a Nd: YAG oscillator/ampflifier with phase-conjugation via stimulated Brillouin scattering,” Appl. Phys. B 36(2), 83–92 (1985).
    [Crossref]
  11. J. Ogino, S. Miyamoto, T. Matsuyama, K. Sueda, H. Yoshida, K. Tsubakimoto, and N. Miyanaga, “Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression,” Appl. Phys. Express 7(12), 122702 (2014).
    [Crossref]

2015 (1)

2014 (1)

J. Ogino, S. Miyamoto, T. Matsuyama, K. Sueda, H. Yoshida, K. Tsubakimoto, and N. Miyanaga, “Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression,” Appl. Phys. Express 7(12), 122702 (2014).
[Crossref]

2009 (1)

M. Poulter, N. Hay, P. C. Ben Fulford, and M. Mason, “Q-switched Nd:YAG lasers for high average-power and high peak-power operation,” Proc. SPIE 7193, 719309 (2009).
[Crossref]

2007 (2)

R. Bhushan, K. Tsubakimoto, H. Yoshida, H. Fujita, and M. Nakatsuka, “Thermally Induced Birefringence Compensation in High Average Power Nd:YAG Laser,” Jpn. J. Appl. Phys. 46(3A), 1051–1053 (2007).
[Crossref]

T. Riesbeck and H. J. Eichler, “A high power laser system at 540 nm with beam coupling by second harmonic generation,” Opt. Commun. 275(2), 429–432 (2007).
[Crossref]

2003 (1)

2001 (1)

T. Riesbeck, E. Risse, and H. J. Eichler, “Pulsed solid-state laser system with fiber phase conjugation and 315Waverage output power,” Appl. Phys. B 73(8), 847–849 (2001).
[Crossref]

1997 (2)

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

H. Yoshida, V. Kmetik, H. Fujita, M. Nakatsuka, T. Yamanaka, and K. Yoshida, “Heavy fluorocarbon liquids for a phase-conjugated stimulated Brillouin scattering mirror,” Appl. Opt. 36(16), 3739–3744 (1997).
[Crossref] [PubMed]

1985 (1)

I. D. Carr and D. C. Hanna, “Performance of a Nd: YAG oscillator/ampflifier with phase-conjugation via stimulated Brillouin scattering,” Appl. Phys. B 36(2), 83–92 (1985).
[Crossref]

Ahmed, M. A.

Bauer, D.

Ben Fulford, P. C.

M. Poulter, N. Hay, P. C. Ben Fulford, and M. Mason, “Q-switched Nd:YAG lasers for high average-power and high peak-power operation,” Proc. SPIE 7193, 719309 (2009).
[Crossref]

Berg, J. G.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Bhushan, R.

R. Bhushan, K. Tsubakimoto, H. Yoshida, H. Fujita, and M. Nakatsuka, “Thermally Induced Birefringence Compensation in High Average Power Nd:YAG Laser,” Jpn. J. Appl. Phys. 46(3A), 1051–1053 (2007).
[Crossref]

Carr, I. D.

I. D. Carr and D. C. Hanna, “Performance of a Nd: YAG oscillator/ampflifier with phase-conjugation via stimulated Brillouin scattering,” Appl. Phys. B 36(2), 83–92 (1985).
[Crossref]

Eichler, H. J.

T. Riesbeck and H. J. Eichler, “A high power laser system at 540 nm with beam coupling by second harmonic generation,” Opt. Commun. 275(2), 429–432 (2007).
[Crossref]

T. Riesbeck, E. Risse, and H. J. Eichler, “Pulsed solid-state laser system with fiber phase conjugation and 315Waverage output power,” Appl. Phys. B 73(8), 847–849 (2001).
[Crossref]

Engler, T.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Fujita, H.

R. Bhushan, K. Tsubakimoto, H. Yoshida, H. Fujita, and M. Nakatsuka, “Thermally Induced Birefringence Compensation in High Average Power Nd:YAG Laser,” Jpn. J. Appl. Phys. 46(3A), 1051–1053 (2007).
[Crossref]

H. Yoshida, V. Kmetik, H. Fujita, M. Nakatsuka, T. Yamanaka, and K. Yoshida, “Heavy fluorocarbon liquids for a phase-conjugated stimulated Brillouin scattering mirror,” Appl. Opt. 36(16), 3739–3744 (1997).
[Crossref] [PubMed]

Furuta, K.

T. Kojima, K. Furuta, M. Kurosawa, and J. Nishimae, “400-W Diode-Pumped Solid-State Green Laser,” inConference on Lasers and Electro-Optics/Pacific Rim, 280–281 (2005).

Graf, T.

Hall, D.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Hanna, D. C.

I. D. Carr and D. C. Hanna, “Performance of a Nd: YAG oscillator/ampflifier with phase-conjugation via stimulated Brillouin scattering,” Appl. Phys. B 36(2), 83–92 (1985).
[Crossref]

Harpole, G. M.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Hay, N.

M. Poulter, N. Hay, P. C. Ben Fulford, and M. Mason, “Q-switched Nd:YAG lasers for high average-power and high peak-power operation,” Proc. SPIE 7193, 719309 (2009).
[Crossref]

Hilyard, R. C.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Holleman, G. W.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Injeyan, H.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Kageyama, N.

Kan, H.

Killi, A.

Kiriyama, H.

Kmetik, V.

Kojima, T.

T. Kojima, K. Furuta, M. Kurosawa, and J. Nishimae, “400-W Diode-Pumped Solid-State Green Laser,” inConference on Lasers and Electro-Optics/Pacific Rim, 280–281 (2005).

Kurosawa, M.

T. Kojima, K. Furuta, M. Kurosawa, and J. Nishimae, “400-W Diode-Pumped Solid-State Green Laser,” inConference on Lasers and Electro-Optics/Pacific Rim, 280–281 (2005).

Loescher, A.

Machan, J.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Mason, M.

M. Poulter, N. Hay, P. C. Ben Fulford, and M. Mason, “Q-switched Nd:YAG lasers for high average-power and high peak-power operation,” Proc. SPIE 7193, 719309 (2009).
[Crossref]

Matsuyama, T.

J. Ogino, S. Miyamoto, T. Matsuyama, K. Sueda, H. Yoshida, K. Tsubakimoto, and N. Miyanaga, “Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression,” Appl. Phys. Express 7(12), 122702 (2014).
[Crossref]

Mitchell, M.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Miyajima, H.

Miyamoto, S.

J. Ogino, S. Miyamoto, T. Matsuyama, K. Sueda, H. Yoshida, K. Tsubakimoto, and N. Miyanaga, “Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression,” Appl. Phys. Express 7(12), 122702 (2014).
[Crossref]

Miyanaga, N.

J. Ogino, S. Miyamoto, T. Matsuyama, K. Sueda, H. Yoshida, K. Tsubakimoto, and N. Miyanaga, “Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression,” Appl. Phys. Express 7(12), 122702 (2014).
[Crossref]

Nagai, T.

Nakatsuka, M.

Negel, J.-P.

Nishimae, J.

T. Kojima, K. Furuta, M. Kurosawa, and J. Nishimae, “400-W Diode-Pumped Solid-State Green Laser,” inConference on Lasers and Electro-Optics/Pacific Rim, 280–281 (2005).

Ogino, J.

J. Ogino, S. Miyamoto, T. Matsuyama, K. Sueda, H. Yoshida, K. Tsubakimoto, and N. Miyanaga, “Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression,” Appl. Phys. Express 7(12), 122702 (2014).
[Crossref]

Poulter, M.

M. Poulter, N. Hay, P. C. Ben Fulford, and M. Mason, “Q-switched Nd:YAG lasers for high average-power and high peak-power operation,” Proc. SPIE 7193, 719309 (2009).
[Crossref]

Riesbeck, T.

T. Riesbeck and H. J. Eichler, “A high power laser system at 540 nm with beam coupling by second harmonic generation,” Opt. Commun. 275(2), 429–432 (2007).
[Crossref]

T. Riesbeck, E. Risse, and H. J. Eichler, “Pulsed solid-state laser system with fiber phase conjugation and 315Waverage output power,” Appl. Phys. B 73(8), 847–849 (2001).
[Crossref]

Risse, E.

T. Riesbeck, E. Risse, and H. J. Eichler, “Pulsed solid-state laser system with fiber phase conjugation and 315Waverage output power,” Appl. Phys. B 73(8), 847–849 (2001).
[Crossref]

St. Pierre, R. J.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Sueda, K.

J. Ogino, S. Miyamoto, T. Matsuyama, K. Sueda, H. Yoshida, K. Tsubakimoto, and N. Miyanaga, “Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression,” Appl. Phys. Express 7(12), 122702 (2014).
[Crossref]

Sutter, D.

Tinti, R.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Tsubakimoto, K.

J. Ogino, S. Miyamoto, T. Matsuyama, K. Sueda, H. Yoshida, K. Tsubakimoto, and N. Miyanaga, “Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression,” Appl. Phys. Express 7(12), 122702 (2014).
[Crossref]

R. Bhushan, K. Tsubakimoto, H. Yoshida, H. Fujita, and M. Nakatsuka, “Thermally Induced Birefringence Compensation in High Average Power Nd:YAG Laser,” Jpn. J. Appl. Phys. 46(3A), 1051–1053 (2007).
[Crossref]

Valley, M.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Voss, A.

Weber, M. E.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Yamakawa, K.

Yamanaka, T.

Yoshida, H.

J. Ogino, S. Miyamoto, T. Matsuyama, K. Sueda, H. Yoshida, K. Tsubakimoto, and N. Miyanaga, “Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression,” Appl. Phys. Express 7(12), 122702 (2014).
[Crossref]

R. Bhushan, K. Tsubakimoto, H. Yoshida, H. Fujita, and M. Nakatsuka, “Thermally Induced Birefringence Compensation in High Average Power Nd:YAG Laser,” Jpn. J. Appl. Phys. 46(3A), 1051–1053 (2007).
[Crossref]

H. Kiriyama, K. Yamakawa, T. Nagai, N. Kageyama, H. Miyajima, H. Kan, H. Yoshida, and M. Nakatsuka, “360-W average power operation with a single-stage diode-pumped Nd:YAG amplifier at a 1-kHz repetition rate,” Opt. Lett. 28(18), 1671–1673 (2003).
[Crossref] [PubMed]

H. Yoshida, V. Kmetik, H. Fujita, M. Nakatsuka, T. Yamanaka, and K. Yoshida, “Heavy fluorocarbon liquids for a phase-conjugated stimulated Brillouin scattering mirror,” Appl. Opt. 36(16), 3739–3744 (1997).
[Crossref] [PubMed]

Yoshida, K.

Zamel, J.

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Appl. Opt. (1)

Appl. Phys. B (2)

T. Riesbeck, E. Risse, and H. J. Eichler, “Pulsed solid-state laser system with fiber phase conjugation and 315Waverage output power,” Appl. Phys. B 73(8), 847–849 (2001).
[Crossref]

I. D. Carr and D. C. Hanna, “Performance of a Nd: YAG oscillator/ampflifier with phase-conjugation via stimulated Brillouin scattering,” Appl. Phys. B 36(2), 83–92 (1985).
[Crossref]

Appl. Phys. Express (1)

J. Ogino, S. Miyamoto, T. Matsuyama, K. Sueda, H. Yoshida, K. Tsubakimoto, and N. Miyanaga, “Two-stage optical parametric chirped-pulse amplifier using sub-nanosecond pump pulse generated by stimulated Brillouin scattering compression,” Appl. Phys. Express 7(12), 122702 (2014).
[Crossref]

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

R. J. St. Pierre, G. W. Holleman, M. Valley, H. Injeyan, J. G. Berg, G. M. Harpole, R. C. Hilyard, M. Mitchell, M. E. Weber, J. Zamel, T. Engler, D. Hall, R. Tinti, and J. Machan, “Active tracker laser (ATLAS),” IEEE J. Sel. Top. Quantum Electron. 3(1), 64–70 (1997).
[Crossref]

Jpn. J. Appl. Phys. (1)

R. Bhushan, K. Tsubakimoto, H. Yoshida, H. Fujita, and M. Nakatsuka, “Thermally Induced Birefringence Compensation in High Average Power Nd:YAG Laser,” Jpn. J. Appl. Phys. 46(3A), 1051–1053 (2007).
[Crossref]

Opt. Commun. (1)

T. Riesbeck and H. J. Eichler, “A high power laser system at 540 nm with beam coupling by second harmonic generation,” Opt. Commun. 275(2), 429–432 (2007).
[Crossref]

Opt. Express (1)

Opt. Lett. (1)

Proc. SPIE (1)

M. Poulter, N. Hay, P. C. Ben Fulford, and M. Mason, “Q-switched Nd:YAG lasers for high average-power and high peak-power operation,” Proc. SPIE 7193, 719309 (2009).
[Crossref]

Other (1)

T. Kojima, K. Furuta, M. Kurosawa, and J. Nishimae, “400-W Diode-Pumped Solid-State Green Laser,” inConference on Lasers and Electro-Optics/Pacific Rim, 280–281 (2005).

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Figures (7)

Fig. 1
Fig. 1 Schematic diagram of the laser system. PM-YDF: polarization maintaining Yb-doped fiber; OSC: laser oscillator; SMF: single mode fiber; LN-AM: lithium niobate amplitude modulator; LMA-YDF: large-mode-area Yb-doped fiber; AMP: amplifier; LP: afocal lens pair; M: mirror; PBS: polarizing beam splitter cube; HWP: half wave plate; 90R: 90° rotator; FR: Faraday rotator; L: lens; HA: hard aperture; Rod: Nd:YAG rod amplifier; SBS-PCM: stimulated Brillouin scattering phase-conjugate mirror; MA: main amplifier.
Fig. 2
Fig. 2 Reflectivity of SBS-PCM for 10 kHz (solid circles), 15 kHz (gray circles) and 30 kHz (white triangles) repetition rates. The data taken at the 10 Hz repetition rate (white circles) are also plotted for comparison.
Fig. 3
Fig. 3 Near- and far-field patterns of MA-1 output beam with normal high-reflectivity mirror (upper photographs, (a)–(c)) and with SBS-PCM (lower photographs, (d)–(f)). (a) and (d): near-field patterns; (b) and (e): far-field patterns observed with a 286-mm focal length lens; (c) and (f): overexposed far-field patterns (by a factor of five) corresponding to (b) and (e), respectively.
Fig. 4
Fig. 4 (a): Second harmonic conversion efficiency. Closed and open circles denote data measured when using the SBS-PCM and the high-reflectivity mirror, respectively. (b) and (c): Temporal profiles of fundamental light for a pulse energy of 35 mJ in the SBS-PCM and HRM cases, respectively.
Fig. 5
Fig. 5 (a) Pulse train of the output laser from MA-2 at 10kHz repetition rate. (b) Burst pulse.
Fig. 6
Fig. 6 Near- and far-field patterns of MA-2 output beam. (a): near-field patterns; (b): far-field patterns observed with a 286-mm focal length lens; (c): overexposed far-field patterns (by a factor of five) corresponding to (b).
Fig. 7
Fig. 7 (a): Averaged second harmonic power and conversion efficiency as a function of fundamental beam power. (b) and (c): Temporal profiles of the fundamental and second harmonic pulses, respectively.

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