Abstract

We demonstrate actively Q-switched deep ultraviolet laser operation at 261 and 320 nm by intracavity frequency doubling of an InGaN laser diode-pumped Pr:LiYF4 laser. We obtain a maximum peak power of 61.6 W (8.7μJ/pulse at 7.7 kHz) and 594 W (19.0μJ/pulse at 7.7 kHz) with a pulse width of 142 and 35 ns at 261 and 320 nm, respectively. The conversion efficiency from the fundamental laser energy at 639 nm to the second-harmonic generation is 88%. Good agreement is obtained with prediction by a rate equation model.

© 2014 Optical Society of America

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  1. R. G. Smart, J. N. Carter, A. C. Tropper, and D. C. Hanna, “CW room temperature operation of praseodymium-doped fluorozirconate glass fibre lasers in the blue-green, green and red spectral regions,” Opt. Commun. 86, 333–340 (1991).
    [CrossRef]
  2. T. Sandrock, T. Danger, E. Heumann, G. Huber, and B. H. T. Chai, “Efficient continuous wave-laser emission of Pr3+-doped fluorides at room temperature,” Appl. Phys. B 58, 149–151 (1994).
    [CrossRef]
  3. A. Richter, E. Heumann, E. Osiac, G. Huber, W. Seelert, and A. Diening, “Diode pumping of a continuous-wave Pr3+ doped LiYF4 laser,” Opt. Lett. 29, 2638–2640 (2004).
    [CrossRef]
  4. K. Hashimoto and F. Kannari, “High-power GaN diode-pumped continuous wave Pr3+-doped LiYF4 laser,” Opt. Lett. 32, 2493–2495 (2007).
    [CrossRef]
  5. N.-O. Hansen, A.-R. Bellancourt, U. Weichmann, and G. Huber, “Efficient green continuous-wave lasing of blue-diode-pumped solid-state lasers based on praseodymium-doped LiYF4,” Appl. Opt. 49, 3864–3868 (2010).
    [CrossRef]
  6. T. Gün, P. Metz, and G. Huber, “Power scaling of laser diode pumped Pr3+:LiYF4  cw lasers: efficient laser operation at 522.6  nm, 545.9  nm, 607.2  nm, and 639.5  nm,” Opt. Lett. 36, 1002–1004 (2011).
    [CrossRef]
  7. A. Richter, N. Pavel, E. Heumann, G. Huber, D. Parisi, A. Toncelli, M. Tonelli, A. Diening, and W. Seelert, “Continuous-wave ultraviolet generation at 320  nm by intracavity frequency doubling of red-emitting praseodymium lasers,” Opt. Express 14, 3282–3287 (2006).
    [CrossRef]
  8. V. Ostroumov, W. Seelert, and L. Hunziker, “522/261  nm cw generation of Pr:YLF laser pumped by OPS laser,” Proc. SPIE 6451, 645104 (2007).
    [CrossRef]
  9. V. Ostroumov, W. Seelert, L. Hunziker, A. Richter, E. Heumann, and G. Huber, “UV generation by intracavity frequency doubling of an OPS-pumped Pr:YLF laser with 500  mW of cw power at 360  nm,” Proc. SPIE 6451, 645103 (2007).
    [CrossRef]
  10. T. Gün, P. Metz, and G. Huber, “Efficient continuous wave deep ultraviolet Pr3+: LiYF4 laser at 261.3  nm,” Appl. Phys. Lett. 99, 181103 (2011).
    [CrossRef]
  11. S. Ruan, J. M. Sutherland, P. M. W. French, and J. R. Taylor, “Kerr-lens mode-locked visible transitions of a Pr:YLF laser,” Opt. Lett. 20, 1041–1043 (1995).
    [CrossRef]
  12. J. M. Sutherland, B. H. T. Chai, P. M. W. French, and J. R. Taylor, “Visible continuous-wave laser transitions in Pr3+:YLF and femtosecond pulse generation,” Opt. Lett. 21, 797–799 (1996).
    [CrossRef]
  13. J. Kojou, Y. Watanabe, Y. Kojima, H. Nemoto, and F. Kannari, “Intra-cavity second-harmonic generation at 320  nm of an actively Q-switched Pr:LiYF4 laser,” Appl. Opt. 51, 1382–1386 (2012).
    [CrossRef]
  14. V. G. Savitski, I. M. Ranieri, A. B. Krysa, and S. Calvez, “Passively Q-switched Pr:YLF laser,” in Conference on Laser and Electro-Optics (CLEO 2011), OSA Technical Digest (CD) (Optical Society of America, 2011), paper CMB7.
  15. R. Abe, J. Kojou, K. Masuda, and F. Kannari, “Cr4+-doped Y3Al5O12 as a saturable absorber for a Q-switched and mode-locked 639-nm Pr3+-doped LiYF4 laser,” Appl. Phys. Express 6, 032703 (2013).
    [CrossRef]
  16. G. Huber, A. Richter, and E. Heumann, “Continuous wave praseodymium solid-state lasers,” Proc. SPIE 6451, 645102 (2007).
    [CrossRef]
  17. J. Kojou, Y. Watanabe, P. Agrawal, T. Kamimura, and F. Kannari, “Wavelength tunable Q-switch laser in visible region with Pr3+-doped fluoride-glass fiber pumped by GaN diode laser,” Opt. Commun. 290, 136–140 (2013).
    [CrossRef]
  18. H. Kogelnik and T. Li, “Laser beams and resonators,” Appl. Opt. 5, 1550–1567 (1966).
    [CrossRef]
  19. Y. Sato and T. Taira, “Saturation factors of pump absorption in solid-state lasers,” IEEE J. Quantum Electron. 40, 270–280 (2004).
    [CrossRef]
  20. W. Koechner, Solid-State Laser Engineering (Springer-Verlag, 1988).
  21. W.-L. Zhou, Y. Mori, T. Sasaki, and S. Nakai, “High-efficiency intracavity continuous-wave ultraviolet generation using crystals CsLiB6010, β-BaB2O4, and LiB305,” Opt. Commun. 123, 583–586 (1996).
    [CrossRef]

2013

J. Kojou, Y. Watanabe, P. Agrawal, T. Kamimura, and F. Kannari, “Wavelength tunable Q-switch laser in visible region with Pr3+-doped fluoride-glass fiber pumped by GaN diode laser,” Opt. Commun. 290, 136–140 (2013).
[CrossRef]

R. Abe, J. Kojou, K. Masuda, and F. Kannari, “Cr4+-doped Y3Al5O12 as a saturable absorber for a Q-switched and mode-locked 639-nm Pr3+-doped LiYF4 laser,” Appl. Phys. Express 6, 032703 (2013).
[CrossRef]

2012

2011

2010

2007

G. Huber, A. Richter, and E. Heumann, “Continuous wave praseodymium solid-state lasers,” Proc. SPIE 6451, 645102 (2007).
[CrossRef]

K. Hashimoto and F. Kannari, “High-power GaN diode-pumped continuous wave Pr3+-doped LiYF4 laser,” Opt. Lett. 32, 2493–2495 (2007).
[CrossRef]

V. Ostroumov, W. Seelert, and L. Hunziker, “522/261  nm cw generation of Pr:YLF laser pumped by OPS laser,” Proc. SPIE 6451, 645104 (2007).
[CrossRef]

V. Ostroumov, W. Seelert, L. Hunziker, A. Richter, E. Heumann, and G. Huber, “UV generation by intracavity frequency doubling of an OPS-pumped Pr:YLF laser with 500  mW of cw power at 360  nm,” Proc. SPIE 6451, 645103 (2007).
[CrossRef]

2006

2004

A. Richter, E. Heumann, E. Osiac, G. Huber, W. Seelert, and A. Diening, “Diode pumping of a continuous-wave Pr3+ doped LiYF4 laser,” Opt. Lett. 29, 2638–2640 (2004).
[CrossRef]

Y. Sato and T. Taira, “Saturation factors of pump absorption in solid-state lasers,” IEEE J. Quantum Electron. 40, 270–280 (2004).
[CrossRef]

1996

W.-L. Zhou, Y. Mori, T. Sasaki, and S. Nakai, “High-efficiency intracavity continuous-wave ultraviolet generation using crystals CsLiB6010, β-BaB2O4, and LiB305,” Opt. Commun. 123, 583–586 (1996).
[CrossRef]

J. M. Sutherland, B. H. T. Chai, P. M. W. French, and J. R. Taylor, “Visible continuous-wave laser transitions in Pr3+:YLF and femtosecond pulse generation,” Opt. Lett. 21, 797–799 (1996).
[CrossRef]

1995

1994

T. Sandrock, T. Danger, E. Heumann, G. Huber, and B. H. T. Chai, “Efficient continuous wave-laser emission of Pr3+-doped fluorides at room temperature,” Appl. Phys. B 58, 149–151 (1994).
[CrossRef]

1991

R. G. Smart, J. N. Carter, A. C. Tropper, and D. C. Hanna, “CW room temperature operation of praseodymium-doped fluorozirconate glass fibre lasers in the blue-green, green and red spectral regions,” Opt. Commun. 86, 333–340 (1991).
[CrossRef]

1966

Abe, R.

R. Abe, J. Kojou, K. Masuda, and F. Kannari, “Cr4+-doped Y3Al5O12 as a saturable absorber for a Q-switched and mode-locked 639-nm Pr3+-doped LiYF4 laser,” Appl. Phys. Express 6, 032703 (2013).
[CrossRef]

Agrawal, P.

J. Kojou, Y. Watanabe, P. Agrawal, T. Kamimura, and F. Kannari, “Wavelength tunable Q-switch laser in visible region with Pr3+-doped fluoride-glass fiber pumped by GaN diode laser,” Opt. Commun. 290, 136–140 (2013).
[CrossRef]

Bellancourt, A.-R.

Calvez, S.

V. G. Savitski, I. M. Ranieri, A. B. Krysa, and S. Calvez, “Passively Q-switched Pr:YLF laser,” in Conference on Laser and Electro-Optics (CLEO 2011), OSA Technical Digest (CD) (Optical Society of America, 2011), paper CMB7.

Carter, J. N.

R. G. Smart, J. N. Carter, A. C. Tropper, and D. C. Hanna, “CW room temperature operation of praseodymium-doped fluorozirconate glass fibre lasers in the blue-green, green and red spectral regions,” Opt. Commun. 86, 333–340 (1991).
[CrossRef]

Chai, B. H. T.

J. M. Sutherland, B. H. T. Chai, P. M. W. French, and J. R. Taylor, “Visible continuous-wave laser transitions in Pr3+:YLF and femtosecond pulse generation,” Opt. Lett. 21, 797–799 (1996).
[CrossRef]

T. Sandrock, T. Danger, E. Heumann, G. Huber, and B. H. T. Chai, “Efficient continuous wave-laser emission of Pr3+-doped fluorides at room temperature,” Appl. Phys. B 58, 149–151 (1994).
[CrossRef]

Danger, T.

T. Sandrock, T. Danger, E. Heumann, G. Huber, and B. H. T. Chai, “Efficient continuous wave-laser emission of Pr3+-doped fluorides at room temperature,” Appl. Phys. B 58, 149–151 (1994).
[CrossRef]

Diening, A.

French, P. M. W.

Gün, T.

Hanna, D. C.

R. G. Smart, J. N. Carter, A. C. Tropper, and D. C. Hanna, “CW room temperature operation of praseodymium-doped fluorozirconate glass fibre lasers in the blue-green, green and red spectral regions,” Opt. Commun. 86, 333–340 (1991).
[CrossRef]

Hansen, N.-O.

Hashimoto, K.

Heumann, E.

G. Huber, A. Richter, and E. Heumann, “Continuous wave praseodymium solid-state lasers,” Proc. SPIE 6451, 645102 (2007).
[CrossRef]

V. Ostroumov, W. Seelert, L. Hunziker, A. Richter, E. Heumann, and G. Huber, “UV generation by intracavity frequency doubling of an OPS-pumped Pr:YLF laser with 500  mW of cw power at 360  nm,” Proc. SPIE 6451, 645103 (2007).
[CrossRef]

A. Richter, N. Pavel, E. Heumann, G. Huber, D. Parisi, A. Toncelli, M. Tonelli, A. Diening, and W. Seelert, “Continuous-wave ultraviolet generation at 320  nm by intracavity frequency doubling of red-emitting praseodymium lasers,” Opt. Express 14, 3282–3287 (2006).
[CrossRef]

A. Richter, E. Heumann, E. Osiac, G. Huber, W. Seelert, and A. Diening, “Diode pumping of a continuous-wave Pr3+ doped LiYF4 laser,” Opt. Lett. 29, 2638–2640 (2004).
[CrossRef]

T. Sandrock, T. Danger, E. Heumann, G. Huber, and B. H. T. Chai, “Efficient continuous wave-laser emission of Pr3+-doped fluorides at room temperature,” Appl. Phys. B 58, 149–151 (1994).
[CrossRef]

Huber, G.

T. Gün, P. Metz, and G. Huber, “Power scaling of laser diode pumped Pr3+:LiYF4  cw lasers: efficient laser operation at 522.6  nm, 545.9  nm, 607.2  nm, and 639.5  nm,” Opt. Lett. 36, 1002–1004 (2011).
[CrossRef]

T. Gün, P. Metz, and G. Huber, “Efficient continuous wave deep ultraviolet Pr3+: LiYF4 laser at 261.3  nm,” Appl. Phys. Lett. 99, 181103 (2011).
[CrossRef]

N.-O. Hansen, A.-R. Bellancourt, U. Weichmann, and G. Huber, “Efficient green continuous-wave lasing of blue-diode-pumped solid-state lasers based on praseodymium-doped LiYF4,” Appl. Opt. 49, 3864–3868 (2010).
[CrossRef]

V. Ostroumov, W. Seelert, L. Hunziker, A. Richter, E. Heumann, and G. Huber, “UV generation by intracavity frequency doubling of an OPS-pumped Pr:YLF laser with 500  mW of cw power at 360  nm,” Proc. SPIE 6451, 645103 (2007).
[CrossRef]

G. Huber, A. Richter, and E. Heumann, “Continuous wave praseodymium solid-state lasers,” Proc. SPIE 6451, 645102 (2007).
[CrossRef]

A. Richter, N. Pavel, E. Heumann, G. Huber, D. Parisi, A. Toncelli, M. Tonelli, A. Diening, and W. Seelert, “Continuous-wave ultraviolet generation at 320  nm by intracavity frequency doubling of red-emitting praseodymium lasers,” Opt. Express 14, 3282–3287 (2006).
[CrossRef]

A. Richter, E. Heumann, E. Osiac, G. Huber, W. Seelert, and A. Diening, “Diode pumping of a continuous-wave Pr3+ doped LiYF4 laser,” Opt. Lett. 29, 2638–2640 (2004).
[CrossRef]

T. Sandrock, T. Danger, E. Heumann, G. Huber, and B. H. T. Chai, “Efficient continuous wave-laser emission of Pr3+-doped fluorides at room temperature,” Appl. Phys. B 58, 149–151 (1994).
[CrossRef]

Hunziker, L.

V. Ostroumov, W. Seelert, and L. Hunziker, “522/261  nm cw generation of Pr:YLF laser pumped by OPS laser,” Proc. SPIE 6451, 645104 (2007).
[CrossRef]

V. Ostroumov, W. Seelert, L. Hunziker, A. Richter, E. Heumann, and G. Huber, “UV generation by intracavity frequency doubling of an OPS-pumped Pr:YLF laser with 500  mW of cw power at 360  nm,” Proc. SPIE 6451, 645103 (2007).
[CrossRef]

Kamimura, T.

J. Kojou, Y. Watanabe, P. Agrawal, T. Kamimura, and F. Kannari, “Wavelength tunable Q-switch laser in visible region with Pr3+-doped fluoride-glass fiber pumped by GaN diode laser,” Opt. Commun. 290, 136–140 (2013).
[CrossRef]

Kannari, F.

J. Kojou, Y. Watanabe, P. Agrawal, T. Kamimura, and F. Kannari, “Wavelength tunable Q-switch laser in visible region with Pr3+-doped fluoride-glass fiber pumped by GaN diode laser,” Opt. Commun. 290, 136–140 (2013).
[CrossRef]

R. Abe, J. Kojou, K. Masuda, and F. Kannari, “Cr4+-doped Y3Al5O12 as a saturable absorber for a Q-switched and mode-locked 639-nm Pr3+-doped LiYF4 laser,” Appl. Phys. Express 6, 032703 (2013).
[CrossRef]

J. Kojou, Y. Watanabe, Y. Kojima, H. Nemoto, and F. Kannari, “Intra-cavity second-harmonic generation at 320  nm of an actively Q-switched Pr:LiYF4 laser,” Appl. Opt. 51, 1382–1386 (2012).
[CrossRef]

K. Hashimoto and F. Kannari, “High-power GaN diode-pumped continuous wave Pr3+-doped LiYF4 laser,” Opt. Lett. 32, 2493–2495 (2007).
[CrossRef]

Koechner, W.

W. Koechner, Solid-State Laser Engineering (Springer-Verlag, 1988).

Kogelnik, H.

Kojima, Y.

Kojou, J.

J. Kojou, Y. Watanabe, P. Agrawal, T. Kamimura, and F. Kannari, “Wavelength tunable Q-switch laser in visible region with Pr3+-doped fluoride-glass fiber pumped by GaN diode laser,” Opt. Commun. 290, 136–140 (2013).
[CrossRef]

R. Abe, J. Kojou, K. Masuda, and F. Kannari, “Cr4+-doped Y3Al5O12 as a saturable absorber for a Q-switched and mode-locked 639-nm Pr3+-doped LiYF4 laser,” Appl. Phys. Express 6, 032703 (2013).
[CrossRef]

J. Kojou, Y. Watanabe, Y. Kojima, H. Nemoto, and F. Kannari, “Intra-cavity second-harmonic generation at 320  nm of an actively Q-switched Pr:LiYF4 laser,” Appl. Opt. 51, 1382–1386 (2012).
[CrossRef]

Krysa, A. B.

V. G. Savitski, I. M. Ranieri, A. B. Krysa, and S. Calvez, “Passively Q-switched Pr:YLF laser,” in Conference on Laser and Electro-Optics (CLEO 2011), OSA Technical Digest (CD) (Optical Society of America, 2011), paper CMB7.

Li, T.

Masuda, K.

R. Abe, J. Kojou, K. Masuda, and F. Kannari, “Cr4+-doped Y3Al5O12 as a saturable absorber for a Q-switched and mode-locked 639-nm Pr3+-doped LiYF4 laser,” Appl. Phys. Express 6, 032703 (2013).
[CrossRef]

Metz, P.

Mori, Y.

W.-L. Zhou, Y. Mori, T. Sasaki, and S. Nakai, “High-efficiency intracavity continuous-wave ultraviolet generation using crystals CsLiB6010, β-BaB2O4, and LiB305,” Opt. Commun. 123, 583–586 (1996).
[CrossRef]

Nakai, S.

W.-L. Zhou, Y. Mori, T. Sasaki, and S. Nakai, “High-efficiency intracavity continuous-wave ultraviolet generation using crystals CsLiB6010, β-BaB2O4, and LiB305,” Opt. Commun. 123, 583–586 (1996).
[CrossRef]

Nemoto, H.

Osiac, E.

Ostroumov, V.

V. Ostroumov, W. Seelert, L. Hunziker, A. Richter, E. Heumann, and G. Huber, “UV generation by intracavity frequency doubling of an OPS-pumped Pr:YLF laser with 500  mW of cw power at 360  nm,” Proc. SPIE 6451, 645103 (2007).
[CrossRef]

V. Ostroumov, W. Seelert, and L. Hunziker, “522/261  nm cw generation of Pr:YLF laser pumped by OPS laser,” Proc. SPIE 6451, 645104 (2007).
[CrossRef]

Parisi, D.

Pavel, N.

Ranieri, I. M.

V. G. Savitski, I. M. Ranieri, A. B. Krysa, and S. Calvez, “Passively Q-switched Pr:YLF laser,” in Conference on Laser and Electro-Optics (CLEO 2011), OSA Technical Digest (CD) (Optical Society of America, 2011), paper CMB7.

Richter, A.

V. Ostroumov, W. Seelert, L. Hunziker, A. Richter, E. Heumann, and G. Huber, “UV generation by intracavity frequency doubling of an OPS-pumped Pr:YLF laser with 500  mW of cw power at 360  nm,” Proc. SPIE 6451, 645103 (2007).
[CrossRef]

G. Huber, A. Richter, and E. Heumann, “Continuous wave praseodymium solid-state lasers,” Proc. SPIE 6451, 645102 (2007).
[CrossRef]

A. Richter, N. Pavel, E. Heumann, G. Huber, D. Parisi, A. Toncelli, M. Tonelli, A. Diening, and W. Seelert, “Continuous-wave ultraviolet generation at 320  nm by intracavity frequency doubling of red-emitting praseodymium lasers,” Opt. Express 14, 3282–3287 (2006).
[CrossRef]

A. Richter, E. Heumann, E. Osiac, G. Huber, W. Seelert, and A. Diening, “Diode pumping of a continuous-wave Pr3+ doped LiYF4 laser,” Opt. Lett. 29, 2638–2640 (2004).
[CrossRef]

Ruan, S.

Sandrock, T.

T. Sandrock, T. Danger, E. Heumann, G. Huber, and B. H. T. Chai, “Efficient continuous wave-laser emission of Pr3+-doped fluorides at room temperature,” Appl. Phys. B 58, 149–151 (1994).
[CrossRef]

Sasaki, T.

W.-L. Zhou, Y. Mori, T. Sasaki, and S. Nakai, “High-efficiency intracavity continuous-wave ultraviolet generation using crystals CsLiB6010, β-BaB2O4, and LiB305,” Opt. Commun. 123, 583–586 (1996).
[CrossRef]

Sato, Y.

Y. Sato and T. Taira, “Saturation factors of pump absorption in solid-state lasers,” IEEE J. Quantum Electron. 40, 270–280 (2004).
[CrossRef]

Savitski, V. G.

V. G. Savitski, I. M. Ranieri, A. B. Krysa, and S. Calvez, “Passively Q-switched Pr:YLF laser,” in Conference on Laser and Electro-Optics (CLEO 2011), OSA Technical Digest (CD) (Optical Society of America, 2011), paper CMB7.

Seelert, W.

V. Ostroumov, W. Seelert, L. Hunziker, A. Richter, E. Heumann, and G. Huber, “UV generation by intracavity frequency doubling of an OPS-pumped Pr:YLF laser with 500  mW of cw power at 360  nm,” Proc. SPIE 6451, 645103 (2007).
[CrossRef]

V. Ostroumov, W. Seelert, and L. Hunziker, “522/261  nm cw generation of Pr:YLF laser pumped by OPS laser,” Proc. SPIE 6451, 645104 (2007).
[CrossRef]

A. Richter, N. Pavel, E. Heumann, G. Huber, D. Parisi, A. Toncelli, M. Tonelli, A. Diening, and W. Seelert, “Continuous-wave ultraviolet generation at 320  nm by intracavity frequency doubling of red-emitting praseodymium lasers,” Opt. Express 14, 3282–3287 (2006).
[CrossRef]

A. Richter, E. Heumann, E. Osiac, G. Huber, W. Seelert, and A. Diening, “Diode pumping of a continuous-wave Pr3+ doped LiYF4 laser,” Opt. Lett. 29, 2638–2640 (2004).
[CrossRef]

Smart, R. G.

R. G. Smart, J. N. Carter, A. C. Tropper, and D. C. Hanna, “CW room temperature operation of praseodymium-doped fluorozirconate glass fibre lasers in the blue-green, green and red spectral regions,” Opt. Commun. 86, 333–340 (1991).
[CrossRef]

Sutherland, J. M.

Taira, T.

Y. Sato and T. Taira, “Saturation factors of pump absorption in solid-state lasers,” IEEE J. Quantum Electron. 40, 270–280 (2004).
[CrossRef]

Taylor, J. R.

Toncelli, A.

Tonelli, M.

Tropper, A. C.

R. G. Smart, J. N. Carter, A. C. Tropper, and D. C. Hanna, “CW room temperature operation of praseodymium-doped fluorozirconate glass fibre lasers in the blue-green, green and red spectral regions,” Opt. Commun. 86, 333–340 (1991).
[CrossRef]

Watanabe, Y.

J. Kojou, Y. Watanabe, P. Agrawal, T. Kamimura, and F. Kannari, “Wavelength tunable Q-switch laser in visible region with Pr3+-doped fluoride-glass fiber pumped by GaN diode laser,” Opt. Commun. 290, 136–140 (2013).
[CrossRef]

J. Kojou, Y. Watanabe, Y. Kojima, H. Nemoto, and F. Kannari, “Intra-cavity second-harmonic generation at 320  nm of an actively Q-switched Pr:LiYF4 laser,” Appl. Opt. 51, 1382–1386 (2012).
[CrossRef]

Weichmann, U.

Zhou, W.-L.

W.-L. Zhou, Y. Mori, T. Sasaki, and S. Nakai, “High-efficiency intracavity continuous-wave ultraviolet generation using crystals CsLiB6010, β-BaB2O4, and LiB305,” Opt. Commun. 123, 583–586 (1996).
[CrossRef]

Appl. Opt.

Appl. Phys. B

T. Sandrock, T. Danger, E. Heumann, G. Huber, and B. H. T. Chai, “Efficient continuous wave-laser emission of Pr3+-doped fluorides at room temperature,” Appl. Phys. B 58, 149–151 (1994).
[CrossRef]

Appl. Phys. Express

R. Abe, J. Kojou, K. Masuda, and F. Kannari, “Cr4+-doped Y3Al5O12 as a saturable absorber for a Q-switched and mode-locked 639-nm Pr3+-doped LiYF4 laser,” Appl. Phys. Express 6, 032703 (2013).
[CrossRef]

Appl. Phys. Lett.

T. Gün, P. Metz, and G. Huber, “Efficient continuous wave deep ultraviolet Pr3+: LiYF4 laser at 261.3  nm,” Appl. Phys. Lett. 99, 181103 (2011).
[CrossRef]

IEEE J. Quantum Electron.

Y. Sato and T. Taira, “Saturation factors of pump absorption in solid-state lasers,” IEEE J. Quantum Electron. 40, 270–280 (2004).
[CrossRef]

Opt. Commun.

R. G. Smart, J. N. Carter, A. C. Tropper, and D. C. Hanna, “CW room temperature operation of praseodymium-doped fluorozirconate glass fibre lasers in the blue-green, green and red spectral regions,” Opt. Commun. 86, 333–340 (1991).
[CrossRef]

J. Kojou, Y. Watanabe, P. Agrawal, T. Kamimura, and F. Kannari, “Wavelength tunable Q-switch laser in visible region with Pr3+-doped fluoride-glass fiber pumped by GaN diode laser,” Opt. Commun. 290, 136–140 (2013).
[CrossRef]

W.-L. Zhou, Y. Mori, T. Sasaki, and S. Nakai, “High-efficiency intracavity continuous-wave ultraviolet generation using crystals CsLiB6010, β-BaB2O4, and LiB305,” Opt. Commun. 123, 583–586 (1996).
[CrossRef]

Opt. Express

Opt. Lett.

Proc. SPIE

G. Huber, A. Richter, and E. Heumann, “Continuous wave praseodymium solid-state lasers,” Proc. SPIE 6451, 645102 (2007).
[CrossRef]

V. Ostroumov, W. Seelert, and L. Hunziker, “522/261  nm cw generation of Pr:YLF laser pumped by OPS laser,” Proc. SPIE 6451, 645104 (2007).
[CrossRef]

V. Ostroumov, W. Seelert, L. Hunziker, A. Richter, E. Heumann, and G. Huber, “UV generation by intracavity frequency doubling of an OPS-pumped Pr:YLF laser with 500  mW of cw power at 360  nm,” Proc. SPIE 6451, 645103 (2007).
[CrossRef]

Other

V. G. Savitski, I. M. Ranieri, A. B. Krysa, and S. Calvez, “Passively Q-switched Pr:YLF laser,” in Conference on Laser and Electro-Optics (CLEO 2011), OSA Technical Digest (CD) (Optical Society of America, 2011), paper CMB7.

W. Koechner, Solid-State Laser Engineering (Springer-Verlag, 1988).

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Figures (8)

Fig. 1.
Fig. 1.

Schematic view of V-shaped laser cavity for intracavity SHG of an actively Q-switched Pr:LiYF4 laser pumped by InGaN diode laser.

Fig. 2.
Fig. 2.

Plots of cw laser output power obtained from a straight cavity as function of absorbed pumping laser power for 522 and 639 nm. Diamonds stand for experimental results at 639 nm and squares at 522 nm. Straight lines are numerical simulation results from rate equations.

Fig. 3.
Fig. 3.

Plots of mode-matching efficiency and M2 factor as functions of absorbed pumping laser power.

Fig. 4.
Fig. 4.

Plots of Q-switched 522 nm laser peak power and pulse width obtained from a straight cavity as functions of the initial inversion ratio r, defined by absorbed pumping laser power divided by threshold pumping power (=380mW). Output coupling T is 2%. At repetition rate of 20 kHz, AOM was switched on for 10 μs and switched off for 40 μs. At 11 kHz and 7.7 kHz, AOM was switched on for 10 μs and switched off for 80 and 120 μs, respectively. Solid curves stand for pulse width and peak power obtained from simulation.

Fig. 5.
Fig. 5.

Plots of SH laser peak power and pulse width at 261 nm obtained from V-shaped cavity as functions of initial inversion ratio r. Threshold pumping power is 730 mW. Pulse repetition rate is 7.7 kHz. Solid lines stand for pulse width and peak power obtained from simulation.

Fig. 6.
Fig. 6.

Observed oscilloscope trace of pulse train (measured with a biplanar photo tube) of SH pulse at 261 nm.

Fig. 7.
Fig. 7.

261 nm SH pulse envelope (measured with a biplanar photo tube) at output peak power of 61.6 W. The solid curve stands for the simulation pulse shape.

Fig. 8.
Fig. 8.

Plots of SH laser peak power and pulse width at 320 nm obtained from V-shaped cavity as function of initial inversion ratio r. Threshold pumping power is 364 mW. Pulse repetition rate is 7.7 kHz. The solid curves stand for pulse width and peak power obtained from simulation.

Tables (1)

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Table 1. Comparison of BBO and LBO Type I SHG Properties

Equations (8)

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dNgdt=NgNg0ηpηqηmPinhνLV+Nlτl,
dNldt=(cσstϕ+1τf)NuNlτl,
dNudt=(cσstϕ1τf)Nu+NgNg0ηpηqηmPinhνLV,
dϕdt={cσstllc(NuNl)c2lc(ln(1R1R2)+Li)}ϕ+ξNuτf,
Pout=12ln(R1R2)AhνLcϕ,
dϕdt={cσstllc(NuNl)c2lc(ln(1R1R2)+Li+LAOM(t))}ϕ+ξNuτf,
dϕdt={cσstllc(NuNl)c2lc(ln(1R1R2)+Li+LAOM(t))}ϕ+ξNuτfc2lc(2cγhνωAωεϕ)ϕ,
P2ω=clc(2cγhνωAωεϕ)ϕT2ωlcAϕhνω.

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