Abstract

A single-frequency single-pass amplifier based on Ho:YLF and Ho:LuLF in a scalable slab architecture delivering up to 210 mJ at 2064 nm is demonstrated. The amplifier was end-pumped by a 1890 nm Tm:YLF slab laser and was seeded with a 69 mJ single-frequency Ho:YLF ring laser operating at 50 Hz.

© 2011 OSA

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References

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  1. M. Petros, J. Yu, B. Trieu, B. Yingxin, P. Petzar, and U. N. Singh, “300mJ, injection seeded, compact 2 μm coherent Lidar transmitter,” Proc. SPIE 6409, 64091A (2006).
  2. L. R. Botha, C. Bollig, M. J. D. Esser, R. N. Campbell, C. Jacobs, and D. R. Preussler, “Ho:YLF pumped HBr laser,” Opt. Express 17(22), 20615–20622 (2009).
    [Crossref] [PubMed]
  3. B. M. Walsh, N. Barnes, M. Petros, J. Yu, and U. N. Singh, “Spectroscopy and modeling of solid state lanthanide lasers: application to trivalent Tm3+ and Ho3+ in YLiF4 and LuLiF4,” J. Appl. Phys. 95(7), 3255–3271 (2004).
    [Crossref]
  4. B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “Branching ratios, cross sections, and radiative lifetimes of rare earth ions in solids: application to Tm3+ and Ho3+ ions in LiYF4,” J. Appl. Phys. 83(5), 2772–2787 (1998).
    [Crossref]
  5. B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “On the distribution of energy between the Tm 3F4 and Ho 5I7 manifolds in Tm-sensitized Ho luminescence,” J. Lumin. 75(2), 89–98 (1997).
    [Crossref]
  6. J. Yu, B. C. Trieu, E. A. Modlin, U. N. Singh, M. J. Kavaya, S. Chen, Y. Bai, P. J. Petzar, and M. Petros, “1 J/pulseQ-switched 2 µm solid-state laser,” Opt. Lett. 31(4), 462–464 (2006).
    [Crossref] [PubMed]
  7. A. A. Nikitchev, “Upconversion coefficient measurements in Tm-Ho:YLF and YAG crystals,” in Advanced Solid State Lasers, B. H. T. Chai, ed., OSA Proceedings Series (Optical Society of America, 1995), Vol. 24, p. SC9.
  8. S. So, J. I. Mackenzie, D. P. Shepherd, W. A. Clarkson, J. G. Betterton, and E. K. Gorton, “A power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers,” Appl. Phys. B 84(3), 389–393 (2006).
    [Crossref]
  9. W. A. Clarkson, N. P. Barnes, P. W. Turner, J. Nilsson, and D. C. Hanna, “High-power cladding-pumped Tm-doped silica fiber laser with wavelength tuning from 1860 to 2090 nm,” Opt. Lett. 27(22), 1989–1991 (2002).
    [Crossref] [PubMed]
  10. M. Schellhorn, S. Ngcobo, and C. Bollig, “High-power diode-pumped Tm:YLF slab laser,” Appl. Phys. B 94(2), 195–198 (2009).
    [Crossref]
  11. A. Dergachev, D. Armstrong, A. Smith, T. Drake, and M. Dubois, “High-power, high-energy ZGP OPA pumped by a 2.05-μm Ho:YLF MOPA system,” Proc. SPIE 6875, 687507 (2008).
    [Crossref]
  12. J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient in-band pumped Ho:LuLiF4 2µm laser,” Opt. Lett. 35(3), 420–422 (2010).
    [Crossref] [PubMed]
  13. M. Schellhorn, “High-energy, in-band pumped Q-switched Ho3+:LuLiF4 2 µm laser,” Opt. Lett. 35(15), 2609–2611 (2010).
    [Crossref] [PubMed]
  14. C. Bollig, M. J. D. Esser, C. Jacobs, W. Koen, D. Preussler, K. Nyangaza, and M. Schellhorn, “70 mJ single-frequency Q-Switched Ho:YLF ring laser-amplifier system pumped by a single 82 W Tm fibre laser,” presented at the Middle-Infrared Coherent Sources, Trouville, France, 8–12 June 2009.
  15. J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient fiber-laser pumped Ho:LuLiF4 laser,” Proc. SPIE 7721, 77210V (2010).
    [Crossref]
  16. M. Schellhorn, “A comparison of resonantly pumped Ho:YLF and Ho:LLF lasers in CW and Q-switched operation under identical pump conditions,” Appl. Phys. B (2011), doi:.
    [Crossref]

2011 (1)

M. Schellhorn, “A comparison of resonantly pumped Ho:YLF and Ho:LLF lasers in CW and Q-switched operation under identical pump conditions,” Appl. Phys. B (2011), doi:.
[Crossref]

2010 (3)

2009 (2)

L. R. Botha, C. Bollig, M. J. D. Esser, R. N. Campbell, C. Jacobs, and D. R. Preussler, “Ho:YLF pumped HBr laser,” Opt. Express 17(22), 20615–20622 (2009).
[Crossref] [PubMed]

M. Schellhorn, S. Ngcobo, and C. Bollig, “High-power diode-pumped Tm:YLF slab laser,” Appl. Phys. B 94(2), 195–198 (2009).
[Crossref]

2008 (1)

A. Dergachev, D. Armstrong, A. Smith, T. Drake, and M. Dubois, “High-power, high-energy ZGP OPA pumped by a 2.05-μm Ho:YLF MOPA system,” Proc. SPIE 6875, 687507 (2008).
[Crossref]

2006 (3)

J. Yu, B. C. Trieu, E. A. Modlin, U. N. Singh, M. J. Kavaya, S. Chen, Y. Bai, P. J. Petzar, and M. Petros, “1 J/pulseQ-switched 2 µm solid-state laser,” Opt. Lett. 31(4), 462–464 (2006).
[Crossref] [PubMed]

S. So, J. I. Mackenzie, D. P. Shepherd, W. A. Clarkson, J. G. Betterton, and E. K. Gorton, “A power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers,” Appl. Phys. B 84(3), 389–393 (2006).
[Crossref]

M. Petros, J. Yu, B. Trieu, B. Yingxin, P. Petzar, and U. N. Singh, “300mJ, injection seeded, compact 2 μm coherent Lidar transmitter,” Proc. SPIE 6409, 64091A (2006).

2004 (1)

B. M. Walsh, N. Barnes, M. Petros, J. Yu, and U. N. Singh, “Spectroscopy and modeling of solid state lanthanide lasers: application to trivalent Tm3+ and Ho3+ in YLiF4 and LuLiF4,” J. Appl. Phys. 95(7), 3255–3271 (2004).
[Crossref]

2002 (1)

1998 (1)

B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “Branching ratios, cross sections, and radiative lifetimes of rare earth ions in solids: application to Tm3+ and Ho3+ ions in LiYF4,” J. Appl. Phys. 83(5), 2772–2787 (1998).
[Crossref]

1997 (1)

B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “On the distribution of energy between the Tm 3F4 and Ho 5I7 manifolds in Tm-sensitized Ho luminescence,” J. Lumin. 75(2), 89–98 (1997).
[Crossref]

Armstrong, D.

A. Dergachev, D. Armstrong, A. Smith, T. Drake, and M. Dubois, “High-power, high-energy ZGP OPA pumped by a 2.05-μm Ho:YLF MOPA system,” Proc. SPIE 6875, 687507 (2008).
[Crossref]

Bai, Y.

Barnes, N.

B. M. Walsh, N. Barnes, M. Petros, J. Yu, and U. N. Singh, “Spectroscopy and modeling of solid state lanthanide lasers: application to trivalent Tm3+ and Ho3+ in YLiF4 and LuLiF4,” J. Appl. Phys. 95(7), 3255–3271 (2004).
[Crossref]

Barnes, N. P.

W. A. Clarkson, N. P. Barnes, P. W. Turner, J. Nilsson, and D. C. Hanna, “High-power cladding-pumped Tm-doped silica fiber laser with wavelength tuning from 1860 to 2090 nm,” Opt. Lett. 27(22), 1989–1991 (2002).
[Crossref] [PubMed]

B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “Branching ratios, cross sections, and radiative lifetimes of rare earth ions in solids: application to Tm3+ and Ho3+ ions in LiYF4,” J. Appl. Phys. 83(5), 2772–2787 (1998).
[Crossref]

B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “On the distribution of energy between the Tm 3F4 and Ho 5I7 manifolds in Tm-sensitized Ho luminescence,” J. Lumin. 75(2), 89–98 (1997).
[Crossref]

Betterton, J. G.

S. So, J. I. Mackenzie, D. P. Shepherd, W. A. Clarkson, J. G. Betterton, and E. K. Gorton, “A power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers,” Appl. Phys. B 84(3), 389–393 (2006).
[Crossref]

Bollig, C.

M. Schellhorn, S. Ngcobo, and C. Bollig, “High-power diode-pumped Tm:YLF slab laser,” Appl. Phys. B 94(2), 195–198 (2009).
[Crossref]

L. R. Botha, C. Bollig, M. J. D. Esser, R. N. Campbell, C. Jacobs, and D. R. Preussler, “Ho:YLF pumped HBr laser,” Opt. Express 17(22), 20615–20622 (2009).
[Crossref] [PubMed]

Botha, L. R.

Campbell, R. N.

Chen, S.

Clarkson, W. A.

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient in-band pumped Ho:LuLiF4 2µm laser,” Opt. Lett. 35(3), 420–422 (2010).
[Crossref] [PubMed]

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient fiber-laser pumped Ho:LuLiF4 laser,” Proc. SPIE 7721, 77210V (2010).
[Crossref]

S. So, J. I. Mackenzie, D. P. Shepherd, W. A. Clarkson, J. G. Betterton, and E. K. Gorton, “A power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers,” Appl. Phys. B 84(3), 389–393 (2006).
[Crossref]

W. A. Clarkson, N. P. Barnes, P. W. Turner, J. Nilsson, and D. C. Hanna, “High-power cladding-pumped Tm-doped silica fiber laser with wavelength tuning from 1860 to 2090 nm,” Opt. Lett. 27(22), 1989–1991 (2002).
[Crossref] [PubMed]

Dergachev, A.

A. Dergachev, D. Armstrong, A. Smith, T. Drake, and M. Dubois, “High-power, high-energy ZGP OPA pumped by a 2.05-μm Ho:YLF MOPA system,” Proc. SPIE 6875, 687507 (2008).
[Crossref]

Di Bartolo, B.

B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “Branching ratios, cross sections, and radiative lifetimes of rare earth ions in solids: application to Tm3+ and Ho3+ ions in LiYF4,” J. Appl. Phys. 83(5), 2772–2787 (1998).
[Crossref]

B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “On the distribution of energy between the Tm 3F4 and Ho 5I7 manifolds in Tm-sensitized Ho luminescence,” J. Lumin. 75(2), 89–98 (1997).
[Crossref]

Drake, T.

A. Dergachev, D. Armstrong, A. Smith, T. Drake, and M. Dubois, “High-power, high-energy ZGP OPA pumped by a 2.05-μm Ho:YLF MOPA system,” Proc. SPIE 6875, 687507 (2008).
[Crossref]

Dubois, M.

A. Dergachev, D. Armstrong, A. Smith, T. Drake, and M. Dubois, “High-power, high-energy ZGP OPA pumped by a 2.05-μm Ho:YLF MOPA system,” Proc. SPIE 6875, 687507 (2008).
[Crossref]

Esser, M. J. D.

Gorton, E. K.

S. So, J. I. Mackenzie, D. P. Shepherd, W. A. Clarkson, J. G. Betterton, and E. K. Gorton, “A power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers,” Appl. Phys. B 84(3), 389–393 (2006).
[Crossref]

Hanna, D. C.

Jacobs, C.

Kavaya, M. J.

Kim, J. W.

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient in-band pumped Ho:LuLiF4 2µm laser,” Opt. Lett. 35(3), 420–422 (2010).
[Crossref] [PubMed]

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient fiber-laser pumped Ho:LuLiF4 laser,” Proc. SPIE 7721, 77210V (2010).
[Crossref]

Mackenzie, J. I.

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient fiber-laser pumped Ho:LuLiF4 laser,” Proc. SPIE 7721, 77210V (2010).
[Crossref]

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient in-band pumped Ho:LuLiF4 2µm laser,” Opt. Lett. 35(3), 420–422 (2010).
[Crossref] [PubMed]

S. So, J. I. Mackenzie, D. P. Shepherd, W. A. Clarkson, J. G. Betterton, and E. K. Gorton, “A power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers,” Appl. Phys. B 84(3), 389–393 (2006).
[Crossref]

Modlin, E. A.

Ngcobo, S.

M. Schellhorn, S. Ngcobo, and C. Bollig, “High-power diode-pumped Tm:YLF slab laser,” Appl. Phys. B 94(2), 195–198 (2009).
[Crossref]

Nilsson, J.

Parisi, D.

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient in-band pumped Ho:LuLiF4 2µm laser,” Opt. Lett. 35(3), 420–422 (2010).
[Crossref] [PubMed]

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient fiber-laser pumped Ho:LuLiF4 laser,” Proc. SPIE 7721, 77210V (2010).
[Crossref]

Petros, M.

M. Petros, J. Yu, B. Trieu, B. Yingxin, P. Petzar, and U. N. Singh, “300mJ, injection seeded, compact 2 μm coherent Lidar transmitter,” Proc. SPIE 6409, 64091A (2006).

J. Yu, B. C. Trieu, E. A. Modlin, U. N. Singh, M. J. Kavaya, S. Chen, Y. Bai, P. J. Petzar, and M. Petros, “1 J/pulseQ-switched 2 µm solid-state laser,” Opt. Lett. 31(4), 462–464 (2006).
[Crossref] [PubMed]

B. M. Walsh, N. Barnes, M. Petros, J. Yu, and U. N. Singh, “Spectroscopy and modeling of solid state lanthanide lasers: application to trivalent Tm3+ and Ho3+ in YLiF4 and LuLiF4,” J. Appl. Phys. 95(7), 3255–3271 (2004).
[Crossref]

Petzar, P.

M. Petros, J. Yu, B. Trieu, B. Yingxin, P. Petzar, and U. N. Singh, “300mJ, injection seeded, compact 2 μm coherent Lidar transmitter,” Proc. SPIE 6409, 64091A (2006).

Petzar, P. J.

Preussler, D. R.

Schellhorn, M.

M. Schellhorn, “A comparison of resonantly pumped Ho:YLF and Ho:LLF lasers in CW and Q-switched operation under identical pump conditions,” Appl. Phys. B (2011), doi:.
[Crossref]

M. Schellhorn, “High-energy, in-band pumped Q-switched Ho3+:LuLiF4 2 µm laser,” Opt. Lett. 35(15), 2609–2611 (2010).
[Crossref] [PubMed]

M. Schellhorn, S. Ngcobo, and C. Bollig, “High-power diode-pumped Tm:YLF slab laser,” Appl. Phys. B 94(2), 195–198 (2009).
[Crossref]

Shepherd, D. P.

S. So, J. I. Mackenzie, D. P. Shepherd, W. A. Clarkson, J. G. Betterton, and E. K. Gorton, “A power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers,” Appl. Phys. B 84(3), 389–393 (2006).
[Crossref]

Singh, U. N.

M. Petros, J. Yu, B. Trieu, B. Yingxin, P. Petzar, and U. N. Singh, “300mJ, injection seeded, compact 2 μm coherent Lidar transmitter,” Proc. SPIE 6409, 64091A (2006).

J. Yu, B. C. Trieu, E. A. Modlin, U. N. Singh, M. J. Kavaya, S. Chen, Y. Bai, P. J. Petzar, and M. Petros, “1 J/pulseQ-switched 2 µm solid-state laser,” Opt. Lett. 31(4), 462–464 (2006).
[Crossref] [PubMed]

B. M. Walsh, N. Barnes, M. Petros, J. Yu, and U. N. Singh, “Spectroscopy and modeling of solid state lanthanide lasers: application to trivalent Tm3+ and Ho3+ in YLiF4 and LuLiF4,” J. Appl. Phys. 95(7), 3255–3271 (2004).
[Crossref]

Smith, A.

A. Dergachev, D. Armstrong, A. Smith, T. Drake, and M. Dubois, “High-power, high-energy ZGP OPA pumped by a 2.05-μm Ho:YLF MOPA system,” Proc. SPIE 6875, 687507 (2008).
[Crossref]

So, S.

S. So, J. I. Mackenzie, D. P. Shepherd, W. A. Clarkson, J. G. Betterton, and E. K. Gorton, “A power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers,” Appl. Phys. B 84(3), 389–393 (2006).
[Crossref]

Tonelli, M.

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient fiber-laser pumped Ho:LuLiF4 laser,” Proc. SPIE 7721, 77210V (2010).
[Crossref]

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient in-band pumped Ho:LuLiF4 2µm laser,” Opt. Lett. 35(3), 420–422 (2010).
[Crossref] [PubMed]

Trieu, B.

M. Petros, J. Yu, B. Trieu, B. Yingxin, P. Petzar, and U. N. Singh, “300mJ, injection seeded, compact 2 μm coherent Lidar transmitter,” Proc. SPIE 6409, 64091A (2006).

Trieu, B. C.

Turner, P. W.

Veronesi, S.

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient in-band pumped Ho:LuLiF4 2µm laser,” Opt. Lett. 35(3), 420–422 (2010).
[Crossref] [PubMed]

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient fiber-laser pumped Ho:LuLiF4 laser,” Proc. SPIE 7721, 77210V (2010).
[Crossref]

Walsh, B. M.

B. M. Walsh, N. Barnes, M. Petros, J. Yu, and U. N. Singh, “Spectroscopy and modeling of solid state lanthanide lasers: application to trivalent Tm3+ and Ho3+ in YLiF4 and LuLiF4,” J. Appl. Phys. 95(7), 3255–3271 (2004).
[Crossref]

B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “Branching ratios, cross sections, and radiative lifetimes of rare earth ions in solids: application to Tm3+ and Ho3+ ions in LiYF4,” J. Appl. Phys. 83(5), 2772–2787 (1998).
[Crossref]

B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “On the distribution of energy between the Tm 3F4 and Ho 5I7 manifolds in Tm-sensitized Ho luminescence,” J. Lumin. 75(2), 89–98 (1997).
[Crossref]

Yingxin, B.

M. Petros, J. Yu, B. Trieu, B. Yingxin, P. Petzar, and U. N. Singh, “300mJ, injection seeded, compact 2 μm coherent Lidar transmitter,” Proc. SPIE 6409, 64091A (2006).

Yu, J.

M. Petros, J. Yu, B. Trieu, B. Yingxin, P. Petzar, and U. N. Singh, “300mJ, injection seeded, compact 2 μm coherent Lidar transmitter,” Proc. SPIE 6409, 64091A (2006).

J. Yu, B. C. Trieu, E. A. Modlin, U. N. Singh, M. J. Kavaya, S. Chen, Y. Bai, P. J. Petzar, and M. Petros, “1 J/pulseQ-switched 2 µm solid-state laser,” Opt. Lett. 31(4), 462–464 (2006).
[Crossref] [PubMed]

B. M. Walsh, N. Barnes, M. Petros, J. Yu, and U. N. Singh, “Spectroscopy and modeling of solid state lanthanide lasers: application to trivalent Tm3+ and Ho3+ in YLiF4 and LuLiF4,” J. Appl. Phys. 95(7), 3255–3271 (2004).
[Crossref]

Appl. Phys. B (3)

S. So, J. I. Mackenzie, D. P. Shepherd, W. A. Clarkson, J. G. Betterton, and E. K. Gorton, “A power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers,” Appl. Phys. B 84(3), 389–393 (2006).
[Crossref]

M. Schellhorn, S. Ngcobo, and C. Bollig, “High-power diode-pumped Tm:YLF slab laser,” Appl. Phys. B 94(2), 195–198 (2009).
[Crossref]

M. Schellhorn, “A comparison of resonantly pumped Ho:YLF and Ho:LLF lasers in CW and Q-switched operation under identical pump conditions,” Appl. Phys. B (2011), doi:.
[Crossref]

J. Appl. Phys. (2)

B. M. Walsh, N. Barnes, M. Petros, J. Yu, and U. N. Singh, “Spectroscopy and modeling of solid state lanthanide lasers: application to trivalent Tm3+ and Ho3+ in YLiF4 and LuLiF4,” J. Appl. Phys. 95(7), 3255–3271 (2004).
[Crossref]

B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “Branching ratios, cross sections, and radiative lifetimes of rare earth ions in solids: application to Tm3+ and Ho3+ ions in LiYF4,” J. Appl. Phys. 83(5), 2772–2787 (1998).
[Crossref]

J. Lumin. (1)

B. M. Walsh, N. P. Barnes, and B. Di Bartolo, “On the distribution of energy between the Tm 3F4 and Ho 5I7 manifolds in Tm-sensitized Ho luminescence,” J. Lumin. 75(2), 89–98 (1997).
[Crossref]

Opt. Express (1)

Opt. Lett. (4)

Proc. SPIE (3)

A. Dergachev, D. Armstrong, A. Smith, T. Drake, and M. Dubois, “High-power, high-energy ZGP OPA pumped by a 2.05-μm Ho:YLF MOPA system,” Proc. SPIE 6875, 687507 (2008).
[Crossref]

J. W. Kim, J. I. Mackenzie, D. Parisi, S. Veronesi, M. Tonelli, and W. A. Clarkson, “Efficient fiber-laser pumped Ho:LuLiF4 laser,” Proc. SPIE 7721, 77210V (2010).
[Crossref]

M. Petros, J. Yu, B. Trieu, B. Yingxin, P. Petzar, and U. N. Singh, “300mJ, injection seeded, compact 2 μm coherent Lidar transmitter,” Proc. SPIE 6409, 64091A (2006).

Other (2)

A. A. Nikitchev, “Upconversion coefficient measurements in Tm-Ho:YLF and YAG crystals,” in Advanced Solid State Lasers, B. H. T. Chai, ed., OSA Proceedings Series (Optical Society of America, 1995), Vol. 24, p. SC9.

C. Bollig, M. J. D. Esser, C. Jacobs, W. Koen, D. Preussler, K. Nyangaza, and M. Schellhorn, “70 mJ single-frequency Q-Switched Ho:YLF ring laser-amplifier system pumped by a single 82 W Tm fibre laser,” presented at the Middle-Infrared Coherent Sources, Trouville, France, 8–12 June 2009.

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Figures (5)

Fig. 1
Fig. 1

Experimental layout of the 2 µm slab amplifier system.

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Fig. 2
Fig. 2

Absorption spectra of Ho:YLF (a) [4] and Ho:LuLF (b) [15].

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Fig. 3
Fig. 3

The amplifier output energy, seed energy and gain as a function of the PRF of the seed laser (a). The seed and amplified pulse shapes at full output power (b).

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Fig. 4
Fig. 4

The amplifier output energy and gain versus absorbed 1.9 µm Tm:YLF pump power (a) and seed energy (b).

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Fig. 5
Fig. 5

The horizontal and vertical beam radii of the amplified beam after an f = 500 mm lens. The beam profile without the lens (at the 800 mm position) is shown in the inset.

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