Abstract

The surge of interest in ytterbium-doped materials has led to their being proposed as substitutes for their widely used neodymium counterparts for infrared laser emission. Spectroscopic and laser investigations of ytterbium-doped Ca4GdO(BO3)3 (Yb:GdCOB), a new ytterbium-doped crystal, are reported. Laser performances under titanium:sapphire pumping suggest that this material is suitable for schemes that include laser-diode pumping. A maximum slope efficiency of 58.8% with a corresponding laser threshold of 40 mW has been demonstrated with a 1% output coupler. Laser oscillations were also observed for output-coupler transmissions of as much as 10%. Self-frequency doubling of infrared-laser emission has been observed for the first time to our knowledge in an ytterbium-doped medium. The recent demonstration of the interesting self-frequency-doubling properties of neodymium-doped Ca4GdO(BO3)3 suggests that Yb:GdCOB could also be efficient in visible laser emission because of its lack of reabsorption at the second-harmonic wavelength. All these results show that the calcium oxoborate family can be useful compact and efficient laser-diode-pumped visible-laser sources.

© 1999 Optical Society of America

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  1. F. Mougel, G. Aka, A. Kahn-Harari, H. Hubert, J. M. Benitez, and D. Vivien, “Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB),” Opt. Mater. 8, 161–173 (1197).
    [CrossRef]
  2. F. Augé, F. Mougel, G. Aka, A. Kahn-Harari, D. Vivien, F. Balembois, P. Georges, and A. Brun, “Self-frequency doubling of Nd:Ca4GdO(BO3)3 (Nd:GdCOB) laser pumped by cw Ti:sapphire or laser diode,” in Advanced Solid State Lasers, W. R. Bosenberg and M. M. Fejer, eds., Vol. 19 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1998), pp. 53–55.
  3. P. Lacovara, C. A. Wang, H. K. Choi, R. L. Aggarwal, and T. Y. Fan, “Room-temperature diode-pumped Yb:YAG laser,” Opt. Lett. 16, 1089–1092 (1991).
    [CrossRef] [PubMed]
  4. K. I. Schaffers, L. D. Deloach, and S. A. Payne, “Crystal growth, frequency doubling and infrared laser performance of Yb3+:BaCaBO3F,” IEEE J. Quantum Electron. 32, 741–748 (1996).
    [CrossRef]
  5. S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
    [CrossRef]
  6. G. Aka, A. Kahn-Harari, D. Vivien, J. M. Benitez, F. Salin, and J. Godard, “A new nonlinear and neodymium laser self-frequency doubling crystal with congruent melting Ca4GdO(BO3)3, (GdCOB),” Eur. J. Solid State Inorg. Chem. 33, 727–736 (1996).
  7. G. Aka, A. Kahn-Harari, F. Mougel, D. Vivien, F. Salin, P. Coquelin, P. Colin, D. Pelenc, and J. L. Damelet, “Linear and nonlinear optical properties of a new gadolinium calcium oxoborate crystal: Ca4GdO(BO3)3 (GdCOB),” J. Opt. Soc. Am. B 14, 2238–2247 (1997).
    [CrossRef]
  8. T. N. Khamaganova, V. K. Trunov, and B. F. Dzhurinskii, “The crystal structure of calcium samarium oxide borate Ca8Sm2O2(BO3)6,” Russ. J. Inorgan. Chem. 36, 484–485 (1991).
  9. A. B. Ilyukhin and B. F. Dzhurinskii, “Crystal structure of binary oxoborate LnCa4O(BO3)3,” Russ. J. Inorgan. Chem. 38, 847–850 (1993).
  10. D. Martrou, F. Mougel, G. Aka, A. Kahn-Harari, D. Vivien, and B. Viana, “Laser performance of an ytterbium doped new single crystal: Yb3+:Ca4GdO(BO3)3 (Yb:GdCOB) under end-pumped titanium sapphire,” in Advanced Solid State Lasers, W. R. Bosenberg and M. M. Fejer, eds., Vol. 19 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1998), pp. 454–457.
  11. L. D. Deloach, S. A. Payne, W. L. Kway, J. B. Tassano, S. N. Dixit, and W. F. Krupke, “Vibrational structure in the emission spectra of Yb3+ doped apatite crystals,” J. Lumin. 62, 85–94 (1994).
    [CrossRef]
  12. R. Scheps, J. F. Myers, and S. A. Payne, “End-pumped Yb-doped fluoroapatite laser,” IEEE Photonics Technol. Lett. 5, 1285–1288 (1993).
    [CrossRef]
  13. F. Mougel, A. Kahn-Harari, G. Aka, and D. Pelenc, “Structural and thermal stability of Czochralski grown GdCOB oxoborate crystals,” J. Mater. Chem. 8, 1619–1623 (1998).
    [CrossRef]
  14. J. Mangin, P. Strimer, A. Claverie, and D. Pelenc, “Thermo-optic coefficient of GdCOB,” submitted to IEEE J. Quantum Electron.
  15. B. H. T. Chai, D. A. Hammons, J. M. Eichenholz, Q. Ye, W. K. Jang, L. Shah, G. M. Luntz, M. Richardson, and H. Qiu, “Lasing, second harmonic conversion and self-frequency doubling of Yb:YCOB (Yb:YCa4B3O10),” in Advanced Solid State Lasers, W. R. Bosenberg and M. M. Fejer, eds., Vol. 19 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1998), pp. 59–61.

1998

F. Mougel, A. Kahn-Harari, G. Aka, and D. Pelenc, “Structural and thermal stability of Czochralski grown GdCOB oxoborate crystals,” J. Mater. Chem. 8, 1619–1623 (1998).
[CrossRef]

1997

1996

K. I. Schaffers, L. D. Deloach, and S. A. Payne, “Crystal growth, frequency doubling and infrared laser performance of Yb3+:BaCaBO3F,” IEEE J. Quantum Electron. 32, 741–748 (1996).
[CrossRef]

G. Aka, A. Kahn-Harari, D. Vivien, J. M. Benitez, F. Salin, and J. Godard, “A new nonlinear and neodymium laser self-frequency doubling crystal with congruent melting Ca4GdO(BO3)3, (GdCOB),” Eur. J. Solid State Inorg. Chem. 33, 727–736 (1996).

1994

S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
[CrossRef]

L. D. Deloach, S. A. Payne, W. L. Kway, J. B. Tassano, S. N. Dixit, and W. F. Krupke, “Vibrational structure in the emission spectra of Yb3+ doped apatite crystals,” J. Lumin. 62, 85–94 (1994).
[CrossRef]

1993

R. Scheps, J. F. Myers, and S. A. Payne, “End-pumped Yb-doped fluoroapatite laser,” IEEE Photonics Technol. Lett. 5, 1285–1288 (1993).
[CrossRef]

A. B. Ilyukhin and B. F. Dzhurinskii, “Crystal structure of binary oxoborate LnCa4O(BO3)3,” Russ. J. Inorgan. Chem. 38, 847–850 (1993).

1991

P. Lacovara, C. A. Wang, H. K. Choi, R. L. Aggarwal, and T. Y. Fan, “Room-temperature diode-pumped Yb:YAG laser,” Opt. Lett. 16, 1089–1092 (1991).
[CrossRef] [PubMed]

T. N. Khamaganova, V. K. Trunov, and B. F. Dzhurinskii, “The crystal structure of calcium samarium oxide borate Ca8Sm2O2(BO3)6,” Russ. J. Inorgan. Chem. 36, 484–485 (1991).

1197

F. Mougel, G. Aka, A. Kahn-Harari, H. Hubert, J. M. Benitez, and D. Vivien, “Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB),” Opt. Mater. 8, 161–173 (1197).
[CrossRef]

Aggarwal, R. L.

Aka, G.

F. Mougel, A. Kahn-Harari, G. Aka, and D. Pelenc, “Structural and thermal stability of Czochralski grown GdCOB oxoborate crystals,” J. Mater. Chem. 8, 1619–1623 (1998).
[CrossRef]

G. Aka, A. Kahn-Harari, F. Mougel, D. Vivien, F. Salin, P. Coquelin, P. Colin, D. Pelenc, and J. L. Damelet, “Linear and nonlinear optical properties of a new gadolinium calcium oxoborate crystal: Ca4GdO(BO3)3 (GdCOB),” J. Opt. Soc. Am. B 14, 2238–2247 (1997).
[CrossRef]

G. Aka, A. Kahn-Harari, D. Vivien, J. M. Benitez, F. Salin, and J. Godard, “A new nonlinear and neodymium laser self-frequency doubling crystal with congruent melting Ca4GdO(BO3)3, (GdCOB),” Eur. J. Solid State Inorg. Chem. 33, 727–736 (1996).

F. Mougel, G. Aka, A. Kahn-Harari, H. Hubert, J. M. Benitez, and D. Vivien, “Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB),” Opt. Mater. 8, 161–173 (1197).
[CrossRef]

Benitez, J. M.

G. Aka, A. Kahn-Harari, D. Vivien, J. M. Benitez, F. Salin, and J. Godard, “A new nonlinear and neodymium laser self-frequency doubling crystal with congruent melting Ca4GdO(BO3)3, (GdCOB),” Eur. J. Solid State Inorg. Chem. 33, 727–736 (1996).

F. Mougel, G. Aka, A. Kahn-Harari, H. Hubert, J. M. Benitez, and D. Vivien, “Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB),” Opt. Mater. 8, 161–173 (1197).
[CrossRef]

Chai, B. H. T.

S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
[CrossRef]

Choi, H. K.

Colin, P.

Coquelin, P.

Damelet, J. L.

Deloach, L. D.

K. I. Schaffers, L. D. Deloach, and S. A. Payne, “Crystal growth, frequency doubling and infrared laser performance of Yb3+:BaCaBO3F,” IEEE J. Quantum Electron. 32, 741–748 (1996).
[CrossRef]

L. D. Deloach, S. A. Payne, W. L. Kway, J. B. Tassano, S. N. Dixit, and W. F. Krupke, “Vibrational structure in the emission spectra of Yb3+ doped apatite crystals,” J. Lumin. 62, 85–94 (1994).
[CrossRef]

S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
[CrossRef]

Dixit, S. N.

L. D. Deloach, S. A. Payne, W. L. Kway, J. B. Tassano, S. N. Dixit, and W. F. Krupke, “Vibrational structure in the emission spectra of Yb3+ doped apatite crystals,” J. Lumin. 62, 85–94 (1994).
[CrossRef]

Dzhurinskii, B. F.

A. B. Ilyukhin and B. F. Dzhurinskii, “Crystal structure of binary oxoborate LnCa4O(BO3)3,” Russ. J. Inorgan. Chem. 38, 847–850 (1993).

T. N. Khamaganova, V. K. Trunov, and B. F. Dzhurinskii, “The crystal structure of calcium samarium oxide borate Ca8Sm2O2(BO3)6,” Russ. J. Inorgan. Chem. 36, 484–485 (1991).

Fan, T. Y.

Godard, J.

G. Aka, A. Kahn-Harari, D. Vivien, J. M. Benitez, F. Salin, and J. Godard, “A new nonlinear and neodymium laser self-frequency doubling crystal with congruent melting Ca4GdO(BO3)3, (GdCOB),” Eur. J. Solid State Inorg. Chem. 33, 727–736 (1996).

Hubert, H.

F. Mougel, G. Aka, A. Kahn-Harari, H. Hubert, J. M. Benitez, and D. Vivien, “Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB),” Opt. Mater. 8, 161–173 (1197).
[CrossRef]

Ilyukhin, A. B.

A. B. Ilyukhin and B. F. Dzhurinskii, “Crystal structure of binary oxoborate LnCa4O(BO3)3,” Russ. J. Inorgan. Chem. 38, 847–850 (1993).

Kahn-Harari, A.

F. Mougel, A. Kahn-Harari, G. Aka, and D. Pelenc, “Structural and thermal stability of Czochralski grown GdCOB oxoborate crystals,” J. Mater. Chem. 8, 1619–1623 (1998).
[CrossRef]

G. Aka, A. Kahn-Harari, F. Mougel, D. Vivien, F. Salin, P. Coquelin, P. Colin, D. Pelenc, and J. L. Damelet, “Linear and nonlinear optical properties of a new gadolinium calcium oxoborate crystal: Ca4GdO(BO3)3 (GdCOB),” J. Opt. Soc. Am. B 14, 2238–2247 (1997).
[CrossRef]

G. Aka, A. Kahn-Harari, D. Vivien, J. M. Benitez, F. Salin, and J. Godard, “A new nonlinear and neodymium laser self-frequency doubling crystal with congruent melting Ca4GdO(BO3)3, (GdCOB),” Eur. J. Solid State Inorg. Chem. 33, 727–736 (1996).

F. Mougel, G. Aka, A. Kahn-Harari, H. Hubert, J. M. Benitez, and D. Vivien, “Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB),” Opt. Mater. 8, 161–173 (1197).
[CrossRef]

Khamaganova, T. N.

T. N. Khamaganova, V. K. Trunov, and B. F. Dzhurinskii, “The crystal structure of calcium samarium oxide borate Ca8Sm2O2(BO3)6,” Russ. J. Inorgan. Chem. 36, 484–485 (1991).

Krupke, W. F.

L. D. Deloach, S. A. Payne, W. L. Kway, J. B. Tassano, S. N. Dixit, and W. F. Krupke, “Vibrational structure in the emission spectra of Yb3+ doped apatite crystals,” J. Lumin. 62, 85–94 (1994).
[CrossRef]

S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
[CrossRef]

Kway, W. L.

S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
[CrossRef]

L. D. Deloach, S. A. Payne, W. L. Kway, J. B. Tassano, S. N. Dixit, and W. F. Krupke, “Vibrational structure in the emission spectra of Yb3+ doped apatite crystals,” J. Lumin. 62, 85–94 (1994).
[CrossRef]

Lacovara, P.

Loutts, G.

S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
[CrossRef]

Mougel, F.

F. Mougel, A. Kahn-Harari, G. Aka, and D. Pelenc, “Structural and thermal stability of Czochralski grown GdCOB oxoborate crystals,” J. Mater. Chem. 8, 1619–1623 (1998).
[CrossRef]

G. Aka, A. Kahn-Harari, F. Mougel, D. Vivien, F. Salin, P. Coquelin, P. Colin, D. Pelenc, and J. L. Damelet, “Linear and nonlinear optical properties of a new gadolinium calcium oxoborate crystal: Ca4GdO(BO3)3 (GdCOB),” J. Opt. Soc. Am. B 14, 2238–2247 (1997).
[CrossRef]

F. Mougel, G. Aka, A. Kahn-Harari, H. Hubert, J. M. Benitez, and D. Vivien, “Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB),” Opt. Mater. 8, 161–173 (1197).
[CrossRef]

Myers, J. F.

R. Scheps, J. F. Myers, and S. A. Payne, “End-pumped Yb-doped fluoroapatite laser,” IEEE Photonics Technol. Lett. 5, 1285–1288 (1993).
[CrossRef]

Payne, S. A.

K. I. Schaffers, L. D. Deloach, and S. A. Payne, “Crystal growth, frequency doubling and infrared laser performance of Yb3+:BaCaBO3F,” IEEE J. Quantum Electron. 32, 741–748 (1996).
[CrossRef]

L. D. Deloach, S. A. Payne, W. L. Kway, J. B. Tassano, S. N. Dixit, and W. F. Krupke, “Vibrational structure in the emission spectra of Yb3+ doped apatite crystals,” J. Lumin. 62, 85–94 (1994).
[CrossRef]

S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
[CrossRef]

R. Scheps, J. F. Myers, and S. A. Payne, “End-pumped Yb-doped fluoroapatite laser,” IEEE Photonics Technol. Lett. 5, 1285–1288 (1993).
[CrossRef]

Pelenc, D.

Salin, F.

G. Aka, A. Kahn-Harari, F. Mougel, D. Vivien, F. Salin, P. Coquelin, P. Colin, D. Pelenc, and J. L. Damelet, “Linear and nonlinear optical properties of a new gadolinium calcium oxoborate crystal: Ca4GdO(BO3)3 (GdCOB),” J. Opt. Soc. Am. B 14, 2238–2247 (1997).
[CrossRef]

G. Aka, A. Kahn-Harari, D. Vivien, J. M. Benitez, F. Salin, and J. Godard, “A new nonlinear and neodymium laser self-frequency doubling crystal with congruent melting Ca4GdO(BO3)3, (GdCOB),” Eur. J. Solid State Inorg. Chem. 33, 727–736 (1996).

Schaffers, K. I.

K. I. Schaffers, L. D. Deloach, and S. A. Payne, “Crystal growth, frequency doubling and infrared laser performance of Yb3+:BaCaBO3F,” IEEE J. Quantum Electron. 32, 741–748 (1996).
[CrossRef]

Scheps, R.

R. Scheps, J. F. Myers, and S. A. Payne, “End-pumped Yb-doped fluoroapatite laser,” IEEE Photonics Technol. Lett. 5, 1285–1288 (1993).
[CrossRef]

Smith, L. K.

S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
[CrossRef]

Tassano, J. B.

S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
[CrossRef]

L. D. Deloach, S. A. Payne, W. L. Kway, J. B. Tassano, S. N. Dixit, and W. F. Krupke, “Vibrational structure in the emission spectra of Yb3+ doped apatite crystals,” J. Lumin. 62, 85–94 (1994).
[CrossRef]

Trunov, V. K.

T. N. Khamaganova, V. K. Trunov, and B. F. Dzhurinskii, “The crystal structure of calcium samarium oxide borate Ca8Sm2O2(BO3)6,” Russ. J. Inorgan. Chem. 36, 484–485 (1991).

Vivien, D.

G. Aka, A. Kahn-Harari, F. Mougel, D. Vivien, F. Salin, P. Coquelin, P. Colin, D. Pelenc, and J. L. Damelet, “Linear and nonlinear optical properties of a new gadolinium calcium oxoborate crystal: Ca4GdO(BO3)3 (GdCOB),” J. Opt. Soc. Am. B 14, 2238–2247 (1997).
[CrossRef]

G. Aka, A. Kahn-Harari, D. Vivien, J. M. Benitez, F. Salin, and J. Godard, “A new nonlinear and neodymium laser self-frequency doubling crystal with congruent melting Ca4GdO(BO3)3, (GdCOB),” Eur. J. Solid State Inorg. Chem. 33, 727–736 (1996).

F. Mougel, G. Aka, A. Kahn-Harari, H. Hubert, J. M. Benitez, and D. Vivien, “Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB),” Opt. Mater. 8, 161–173 (1197).
[CrossRef]

Wang, C. A.

Eur. J. Solid State Inorg. Chem.

G. Aka, A. Kahn-Harari, D. Vivien, J. M. Benitez, F. Salin, and J. Godard, “A new nonlinear and neodymium laser self-frequency doubling crystal with congruent melting Ca4GdO(BO3)3, (GdCOB),” Eur. J. Solid State Inorg. Chem. 33, 727–736 (1996).

IEEE J. Quantum Electron.

K. I. Schaffers, L. D. Deloach, and S. A. Payne, “Crystal growth, frequency doubling and infrared laser performance of Yb3+:BaCaBO3F,” IEEE J. Quantum Electron. 32, 741–748 (1996).
[CrossRef]

IEEE Photonics Technol. Lett.

R. Scheps, J. F. Myers, and S. A. Payne, “End-pumped Yb-doped fluoroapatite laser,” IEEE Photonics Technol. Lett. 5, 1285–1288 (1993).
[CrossRef]

J. Appl. Phys.

S. A. Payne, L. D. Deloach, L. K. Smith, W. L. Kway, J. B. Tassano, W. F. Krupke, B. H. T. Chai, and G. Loutts, “Ytterbium-doped apatite-structure crystals: a new class of laser materials,” J. Appl. Phys. 76, 497–503 (1994).
[CrossRef]

J. Lumin.

L. D. Deloach, S. A. Payne, W. L. Kway, J. B. Tassano, S. N. Dixit, and W. F. Krupke, “Vibrational structure in the emission spectra of Yb3+ doped apatite crystals,” J. Lumin. 62, 85–94 (1994).
[CrossRef]

J. Mater. Chem.

F. Mougel, A. Kahn-Harari, G. Aka, and D. Pelenc, “Structural and thermal stability of Czochralski grown GdCOB oxoborate crystals,” J. Mater. Chem. 8, 1619–1623 (1998).
[CrossRef]

J. Opt. Soc. Am. B

Opt. Lett.

Opt. Mater.

F. Mougel, G. Aka, A. Kahn-Harari, H. Hubert, J. M. Benitez, and D. Vivien, “Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB),” Opt. Mater. 8, 161–173 (1197).
[CrossRef]

Russ. J. Inorgan. Chem.

T. N. Khamaganova, V. K. Trunov, and B. F. Dzhurinskii, “The crystal structure of calcium samarium oxide borate Ca8Sm2O2(BO3)6,” Russ. J. Inorgan. Chem. 36, 484–485 (1991).

A. B. Ilyukhin and B. F. Dzhurinskii, “Crystal structure of binary oxoborate LnCa4O(BO3)3,” Russ. J. Inorgan. Chem. 38, 847–850 (1993).

Other

D. Martrou, F. Mougel, G. Aka, A. Kahn-Harari, D. Vivien, and B. Viana, “Laser performance of an ytterbium doped new single crystal: Yb3+:Ca4GdO(BO3)3 (Yb:GdCOB) under end-pumped titanium sapphire,” in Advanced Solid State Lasers, W. R. Bosenberg and M. M. Fejer, eds., Vol. 19 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1998), pp. 454–457.

J. Mangin, P. Strimer, A. Claverie, and D. Pelenc, “Thermo-optic coefficient of GdCOB,” submitted to IEEE J. Quantum Electron.

B. H. T. Chai, D. A. Hammons, J. M. Eichenholz, Q. Ye, W. K. Jang, L. Shah, G. M. Luntz, M. Richardson, and H. Qiu, “Lasing, second harmonic conversion and self-frequency doubling of Yb:YCOB (Yb:YCa4B3O10),” in Advanced Solid State Lasers, W. R. Bosenberg and M. M. Fejer, eds., Vol. 19 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1998), pp. 59–61.

F. Augé, F. Mougel, G. Aka, A. Kahn-Harari, D. Vivien, F. Balembois, P. Georges, and A. Brun, “Self-frequency doubling of Nd:Ca4GdO(BO3)3 (Nd:GdCOB) laser pumped by cw Ti:sapphire or laser diode,” in Advanced Solid State Lasers, W. R. Bosenberg and M. M. Fejer, eds., Vol. 19 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1998), pp. 53–55.

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Figures (12)

Fig. 1
Fig. 1

Cationic sites in GdCOB.

Fig. 2
Fig. 2

Absorption spectra for Yb:GdCOB at 12 K.

Fig. 3
Fig. 3

Detail of the zero-line absorption at 12 K with simple computer deconvolution of the spectrum.

Fig. 4
Fig. 4

Yb:GdCOB 12-K absorption spectrum (a) shifted in energy and compared with (b) its Raman spectrum.

Fig. 5
Fig. 5

Computer deconvolution of Yb (C) transitions, including the vibronic sidebands that arise from coupling with the BO3 vibrational modes.

Fig. 6
Fig. 6

Computer fitting model of Yb (B) transitions, including the coupling with external lattice and local vibrations.

Fig. 7
Fig. 7

Polarized absorption cross-section spectrum of Yb:GdCOB at room temperature.

Fig. 8
Fig. 8

Polarized emission cross-section spectrum of Yb:GdCOB at room temperature calculated by the Füchtbauer–Ladenburg method.

Fig. 9
Fig. 9

Polarized gain cross-section spectrum of Yb:GdCOB at room temperature.

Fig. 10
Fig. 10

Laser performance of Yb:GdCOB (7 and 15-at. %) crystals in a concave-plane cavity under Ti:Sapphire pumping at 902 nm: HR, HR2, high-reflectivity mirror.

Fig. 11
Fig. 11

Laser performance of a 15-at. % Yb:GdCOB crystal, showing the radiation trapping effects.

Fig. 12
Fig. 12

Laser performance obtained with a 3-mm-thick of 15-at. % Yb:GdCOB crystal (plano–concave cavity): HR, highly reflecting mirror.

Tables (3)

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Table 1 Stark Levels of Yb3+2LJ Manifold in GdCOB, FAP, and YAG

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Table 2 Laser Parameters and Spectral Features of Yb3+-Doped GdCOB Compared with Those of Other Yb-Doped Laser Materials

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Table 3 Slope Efficiency and Threshold Values of Several Runs of Yb-Doped GdCOB Crystals Compared with Other Laser Materials

Equations (13)

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bY,(a, Z)=26°,(c, X)=15°,β=101.26°.
Aif=1τrad=gfgi8πc3λ2q=X,Y,Zσabsq(λ)nq2(λ)λ2dλ,
nX2=2.8065+0.02347λ2-0.01300-0.00356λ2,
nY2=2.8957+0.02402λ2-0.01395-0.01039λ2,
nZ2=2.9222+0.02471λ2-0.01279-0.00820λ2.
σemq(λ)
=3λ58πcτradnq2(λ)Iq(λ)λ[IX(λ)+IY(λ)+IZ(λ)]dλ,
βmin=σabs(λext)σabs(λext)+σem(λext).
βmin=1-Z(2F7/2)Z(2F5/2)exphcKT1λZL-1λext-1,
Z=igi exp-ΔEiKT,
Isat=hcλpumpσabs(λpump)τem,
Imin=βminIsat.
σg(λ)=βσem(λ)-(1-β)σabs(λ),

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