Abstract

Upconversion laser emission has been achieved in BaY2F8:Er 5% by pumping of either the ground state or an excited state of the Er3+ ion. The initial excitation step has been identified with precise measurement data of the Stark level structure of the Er3+ ion in this system. Small increments in the pump wavelength can cause the laser to switch from laser operation in the blue to laser operation in the green because of changes in the specific pumping pathway.

© 1994 Optical Society of America

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  1. L. F. Johnson and H. J. Guggenheim, Appl. Phys. Lett. 19, 44 (1971).
    [Crossref]
  2. A. A. Kaminskii, B. P. Sobolev, S. E. Sarkisov, G. A. Denisenko, V. V. Ryabehenkov, V. A. Fedorov, and T. V. Uvarova, Izv. Akad. Nauk SSSR Neorg. Mater. 18, 482 (1982).
  3. F. Tong, W. P. Risk, R. M. Macfarlane, and W. Lenth, Electron. Lett. 25, 1389 (1989).
    [Crossref]
  4. R. R. Stephens and R. A. McFarlane, Opt. Lett. 18, 1 (1993).
    [Crossref]
  5. G. C. Valley and R. A. McFarlane, in Advanced Solid-State Lasers, L. L. Chase and A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), p. 376.
  6. R. J. Thrash and L. F. Johnson, in Compact Blue–Green Lasers Topical Meeting, Vol. 6 of 1992 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), paper ThB3; Annual Meeting, Vol. 23 of OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), paper MJ1.
  7. J. Y. Allain, M. Monerie, and H. Poignant, Electron. Lett. 26, 261 (1990).
    [Crossref]
  8. R. G. Smart, D. C. Hanna, A. C. Tropper, S. T. Davey, S. F. Carter, and D. Szebesta, Electron. Lett. 27, 1307 (1991).
    [Crossref]
  9. T. J. Whitley, C. A. Millar, R. Wyatt, M. C. Brierley, and D. Szebesta, Electron. Lett. 27, 1785 (1991).
    [Crossref]
  10. R. A. McFarlane, in Advanced Solid-State Lasers, L. L. Chase and A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), p. 275.
  11. W. E. Case, M. E. Koch, and A. W. Kueny, J. Lumin. 45, 351 (1990).
    [Crossref]
  12. T. Hebert, R. Wannemacher, R. M. Macfarlane, and W. Lenth, Appl. Phys. Lett. 60, 2592 (1992).
    [Crossref]
  13. S. G. Grubb, K. W. Bennett, R. S. Cannon, and W. F. Humer, Electron. Lett. 28, 1243 (1992).
    [Crossref]
  14. R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).
  15. D. S. Knowles and H. P. Jenssen, Tech. Rep. 1 (MIT Laboratory for Advanced Solid State Laser Materials, Cambridge, Mass., 1991).
  16. A. A. Kaminskii, S. E. Sarkisov, F. Below, and H. J. Eichler, Opt. Quantum Electron. 22, S95 (1990).
    [Crossref]
  17. F. Auzel, A. A. Kaminskii, and D. Meichenin, Phys. Status Solidi A 131, K63 (1992).
    [Crossref]
  18. B. J. Dinerman and P. F. Moulton, in Conference Proceedings, LEOS ’92 (Lasers and Electro-Optics Society, Boston, Mass., 1992), paper SSLT 2.5, p. 310.
    [Crossref]
  19. J. Miniscalco, J. Lightwave Technol. 9, 234 (1991).
    [Crossref]
  20. T. Hebert, R. Wannemacher, W. Lenth, and R. M. Macfarlane, Appl. Phys. Lett. 57, 1727 (1990).
    [Crossref]

1993 (1)

1992 (3)

T. Hebert, R. Wannemacher, R. M. Macfarlane, and W. Lenth, Appl. Phys. Lett. 60, 2592 (1992).
[Crossref]

S. G. Grubb, K. W. Bennett, R. S. Cannon, and W. F. Humer, Electron. Lett. 28, 1243 (1992).
[Crossref]

F. Auzel, A. A. Kaminskii, and D. Meichenin, Phys. Status Solidi A 131, K63 (1992).
[Crossref]

1991 (3)

J. Miniscalco, J. Lightwave Technol. 9, 234 (1991).
[Crossref]

R. G. Smart, D. C. Hanna, A. C. Tropper, S. T. Davey, S. F. Carter, and D. Szebesta, Electron. Lett. 27, 1307 (1991).
[Crossref]

T. J. Whitley, C. A. Millar, R. Wyatt, M. C. Brierley, and D. Szebesta, Electron. Lett. 27, 1785 (1991).
[Crossref]

1990 (5)

W. E. Case, M. E. Koch, and A. W. Kueny, J. Lumin. 45, 351 (1990).
[Crossref]

T. Hebert, R. Wannemacher, W. Lenth, and R. M. Macfarlane, Appl. Phys. Lett. 57, 1727 (1990).
[Crossref]

R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).

A. A. Kaminskii, S. E. Sarkisov, F. Below, and H. J. Eichler, Opt. Quantum Electron. 22, S95 (1990).
[Crossref]

J. Y. Allain, M. Monerie, and H. Poignant, Electron. Lett. 26, 261 (1990).
[Crossref]

1989 (1)

F. Tong, W. P. Risk, R. M. Macfarlane, and W. Lenth, Electron. Lett. 25, 1389 (1989).
[Crossref]

1982 (1)

A. A. Kaminskii, B. P. Sobolev, S. E. Sarkisov, G. A. Denisenko, V. V. Ryabehenkov, V. A. Fedorov, and T. V. Uvarova, Izv. Akad. Nauk SSSR Neorg. Mater. 18, 482 (1982).

1971 (1)

L. F. Johnson and H. J. Guggenheim, Appl. Phys. Lett. 19, 44 (1971).
[Crossref]

Albrecht, G.

R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).

Allain, J. Y.

J. Y. Allain, M. Monerie, and H. Poignant, Electron. Lett. 26, 261 (1990).
[Crossref]

Auzel, F.

F. Auzel, A. A. Kaminskii, and D. Meichenin, Phys. Status Solidi A 131, K63 (1992).
[Crossref]

Beach, R.

R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).

Below, F.

A. A. Kaminskii, S. E. Sarkisov, F. Below, and H. J. Eichler, Opt. Quantum Electron. 22, S95 (1990).
[Crossref]

Bennett, K. W.

S. G. Grubb, K. W. Bennett, R. S. Cannon, and W. F. Humer, Electron. Lett. 28, 1243 (1992).
[Crossref]

Berkstresser, G.

R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).

Brandle, C.

R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).

Brierley, M. C.

T. J. Whitley, C. A. Millar, R. Wyatt, M. C. Brierley, and D. Szebesta, Electron. Lett. 27, 1785 (1991).
[Crossref]

Cannon, R. S.

S. G. Grubb, K. W. Bennett, R. S. Cannon, and W. F. Humer, Electron. Lett. 28, 1243 (1992).
[Crossref]

Carter, S. F.

R. G. Smart, D. C. Hanna, A. C. Tropper, S. T. Davey, S. F. Carter, and D. Szebesta, Electron. Lett. 27, 1307 (1991).
[Crossref]

Case, W. E.

W. E. Case, M. E. Koch, and A. W. Kueny, J. Lumin. 45, 351 (1990).
[Crossref]

Comaskey, B.

R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).

Davey, S. T.

R. G. Smart, D. C. Hanna, A. C. Tropper, S. T. Davey, S. F. Carter, and D. Szebesta, Electron. Lett. 27, 1307 (1991).
[Crossref]

Denisenko, G. A.

A. A. Kaminskii, B. P. Sobolev, S. E. Sarkisov, G. A. Denisenko, V. V. Ryabehenkov, V. A. Fedorov, and T. V. Uvarova, Izv. Akad. Nauk SSSR Neorg. Mater. 18, 482 (1982).

Dinerman, B. J.

B. J. Dinerman and P. F. Moulton, in Conference Proceedings, LEOS ’92 (Lasers and Electro-Optics Society, Boston, Mass., 1992), paper SSLT 2.5, p. 310.
[Crossref]

Eichler, H. J.

A. A. Kaminskii, S. E. Sarkisov, F. Below, and H. J. Eichler, Opt. Quantum Electron. 22, S95 (1990).
[Crossref]

Fedorov, V. A.

A. A. Kaminskii, B. P. Sobolev, S. E. Sarkisov, G. A. Denisenko, V. V. Ryabehenkov, V. A. Fedorov, and T. V. Uvarova, Izv. Akad. Nauk SSSR Neorg. Mater. 18, 482 (1982).

Grubb, S. G.

S. G. Grubb, K. W. Bennett, R. S. Cannon, and W. F. Humer, Electron. Lett. 28, 1243 (1992).
[Crossref]

Guggenheim, H. J.

L. F. Johnson and H. J. Guggenheim, Appl. Phys. Lett. 19, 44 (1971).
[Crossref]

Hanna, D. C.

R. G. Smart, D. C. Hanna, A. C. Tropper, S. T. Davey, S. F. Carter, and D. Szebesta, Electron. Lett. 27, 1307 (1991).
[Crossref]

Hebert, T.

T. Hebert, R. Wannemacher, R. M. Macfarlane, and W. Lenth, Appl. Phys. Lett. 60, 2592 (1992).
[Crossref]

T. Hebert, R. Wannemacher, W. Lenth, and R. M. Macfarlane, Appl. Phys. Lett. 57, 1727 (1990).
[Crossref]

Humer, W. F.

S. G. Grubb, K. W. Bennett, R. S. Cannon, and W. F. Humer, Electron. Lett. 28, 1243 (1992).
[Crossref]

Jenssen, H. P.

D. S. Knowles and H. P. Jenssen, Tech. Rep. 1 (MIT Laboratory for Advanced Solid State Laser Materials, Cambridge, Mass., 1991).

Johnson, L. F.

L. F. Johnson and H. J. Guggenheim, Appl. Phys. Lett. 19, 44 (1971).
[Crossref]

R. J. Thrash and L. F. Johnson, in Compact Blue–Green Lasers Topical Meeting, Vol. 6 of 1992 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), paper ThB3; Annual Meeting, Vol. 23 of OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), paper MJ1.

Kaminskii, A. A.

F. Auzel, A. A. Kaminskii, and D. Meichenin, Phys. Status Solidi A 131, K63 (1992).
[Crossref]

A. A. Kaminskii, S. E. Sarkisov, F. Below, and H. J. Eichler, Opt. Quantum Electron. 22, S95 (1990).
[Crossref]

A. A. Kaminskii, B. P. Sobolev, S. E. Sarkisov, G. A. Denisenko, V. V. Ryabehenkov, V. A. Fedorov, and T. V. Uvarova, Izv. Akad. Nauk SSSR Neorg. Mater. 18, 482 (1982).

Knowles, D. S.

D. S. Knowles and H. P. Jenssen, Tech. Rep. 1 (MIT Laboratory for Advanced Solid State Laser Materials, Cambridge, Mass., 1991).

Koch, M. E.

W. E. Case, M. E. Koch, and A. W. Kueny, J. Lumin. 45, 351 (1990).
[Crossref]

Krupke, W.

R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).

Kueny, A. W.

W. E. Case, M. E. Koch, and A. W. Kueny, J. Lumin. 45, 351 (1990).
[Crossref]

Lenth, W.

T. Hebert, R. Wannemacher, R. M. Macfarlane, and W. Lenth, Appl. Phys. Lett. 60, 2592 (1992).
[Crossref]

T. Hebert, R. Wannemacher, W. Lenth, and R. M. Macfarlane, Appl. Phys. Lett. 57, 1727 (1990).
[Crossref]

F. Tong, W. P. Risk, R. M. Macfarlane, and W. Lenth, Electron. Lett. 25, 1389 (1989).
[Crossref]

Macfarlane, R. M.

T. Hebert, R. Wannemacher, R. M. Macfarlane, and W. Lenth, Appl. Phys. Lett. 60, 2592 (1992).
[Crossref]

T. Hebert, R. Wannemacher, W. Lenth, and R. M. Macfarlane, Appl. Phys. Lett. 57, 1727 (1990).
[Crossref]

F. Tong, W. P. Risk, R. M. Macfarlane, and W. Lenth, Electron. Lett. 25, 1389 (1989).
[Crossref]

McFarlane, R. A.

R. R. Stephens and R. A. McFarlane, Opt. Lett. 18, 1 (1993).
[Crossref]

R. A. McFarlane, in Advanced Solid-State Lasers, L. L. Chase and A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), p. 275.

G. C. Valley and R. A. McFarlane, in Advanced Solid-State Lasers, L. L. Chase and A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), p. 376.

Meichenin, D.

F. Auzel, A. A. Kaminskii, and D. Meichenin, Phys. Status Solidi A 131, K63 (1992).
[Crossref]

Millar, C. A.

T. J. Whitley, C. A. Millar, R. Wyatt, M. C. Brierley, and D. Szebesta, Electron. Lett. 27, 1785 (1991).
[Crossref]

Miniscalco, J.

J. Miniscalco, J. Lightwave Technol. 9, 234 (1991).
[Crossref]

Mitchell, S.

R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).

Monerie, M.

J. Y. Allain, M. Monerie, and H. Poignant, Electron. Lett. 26, 261 (1990).
[Crossref]

Moulton, P. F.

B. J. Dinerman and P. F. Moulton, in Conference Proceedings, LEOS ’92 (Lasers and Electro-Optics Society, Boston, Mass., 1992), paper SSLT 2.5, p. 310.
[Crossref]

Poignant, H.

J. Y. Allain, M. Monerie, and H. Poignant, Electron. Lett. 26, 261 (1990).
[Crossref]

Risk, W. P.

F. Tong, W. P. Risk, R. M. Macfarlane, and W. Lenth, Electron. Lett. 25, 1389 (1989).
[Crossref]

Ryabehenkov, V. V.

A. A. Kaminskii, B. P. Sobolev, S. E. Sarkisov, G. A. Denisenko, V. V. Ryabehenkov, V. A. Fedorov, and T. V. Uvarova, Izv. Akad. Nauk SSSR Neorg. Mater. 18, 482 (1982).

Sarkisov, S. E.

A. A. Kaminskii, S. E. Sarkisov, F. Below, and H. J. Eichler, Opt. Quantum Electron. 22, S95 (1990).
[Crossref]

A. A. Kaminskii, B. P. Sobolev, S. E. Sarkisov, G. A. Denisenko, V. V. Ryabehenkov, V. A. Fedorov, and T. V. Uvarova, Izv. Akad. Nauk SSSR Neorg. Mater. 18, 482 (1982).

Smart, R. G.

R. G. Smart, D. C. Hanna, A. C. Tropper, S. T. Davey, S. F. Carter, and D. Szebesta, Electron. Lett. 27, 1307 (1991).
[Crossref]

Sobolev, B. P.

A. A. Kaminskii, B. P. Sobolev, S. E. Sarkisov, G. A. Denisenko, V. V. Ryabehenkov, V. A. Fedorov, and T. V. Uvarova, Izv. Akad. Nauk SSSR Neorg. Mater. 18, 482 (1982).

Solarz, R.

R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).

Stephens, R. R.

Szebesta, D.

T. J. Whitley, C. A. Millar, R. Wyatt, M. C. Brierley, and D. Szebesta, Electron. Lett. 27, 1785 (1991).
[Crossref]

R. G. Smart, D. C. Hanna, A. C. Tropper, S. T. Davey, S. F. Carter, and D. Szebesta, Electron. Lett. 27, 1307 (1991).
[Crossref]

Thrash, R. J.

R. J. Thrash and L. F. Johnson, in Compact Blue–Green Lasers Topical Meeting, Vol. 6 of 1992 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), paper ThB3; Annual Meeting, Vol. 23 of OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), paper MJ1.

Tong, F.

F. Tong, W. P. Risk, R. M. Macfarlane, and W. Lenth, Electron. Lett. 25, 1389 (1989).
[Crossref]

Tropper, A. C.

R. G. Smart, D. C. Hanna, A. C. Tropper, S. T. Davey, S. F. Carter, and D. Szebesta, Electron. Lett. 27, 1307 (1991).
[Crossref]

Uvarova, T. V.

A. A. Kaminskii, B. P. Sobolev, S. E. Sarkisov, G. A. Denisenko, V. V. Ryabehenkov, V. A. Fedorov, and T. V. Uvarova, Izv. Akad. Nauk SSSR Neorg. Mater. 18, 482 (1982).

Valley, G. C.

G. C. Valley and R. A. McFarlane, in Advanced Solid-State Lasers, L. L. Chase and A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), p. 376.

Wannemacher, R.

T. Hebert, R. Wannemacher, R. M. Macfarlane, and W. Lenth, Appl. Phys. Lett. 60, 2592 (1992).
[Crossref]

T. Hebert, R. Wannemacher, W. Lenth, and R. M. Macfarlane, Appl. Phys. Lett. 57, 1727 (1990).
[Crossref]

Whitley, T. J.

T. J. Whitley, C. A. Millar, R. Wyatt, M. C. Brierley, and D. Szebesta, Electron. Lett. 27, 1785 (1991).
[Crossref]

Wyatt, R.

T. J. Whitley, C. A. Millar, R. Wyatt, M. C. Brierley, and D. Szebesta, Electron. Lett. 27, 1785 (1991).
[Crossref]

Appl. Phys. Lett. (3)

T. Hebert, R. Wannemacher, R. M. Macfarlane, and W. Lenth, Appl. Phys. Lett. 60, 2592 (1992).
[Crossref]

L. F. Johnson and H. J. Guggenheim, Appl. Phys. Lett. 19, 44 (1971).
[Crossref]

T. Hebert, R. Wannemacher, W. Lenth, and R. M. Macfarlane, Appl. Phys. Lett. 57, 1727 (1990).
[Crossref]

Electron. Lett. (5)

S. G. Grubb, K. W. Bennett, R. S. Cannon, and W. F. Humer, Electron. Lett. 28, 1243 (1992).
[Crossref]

F. Tong, W. P. Risk, R. M. Macfarlane, and W. Lenth, Electron. Lett. 25, 1389 (1989).
[Crossref]

J. Y. Allain, M. Monerie, and H. Poignant, Electron. Lett. 26, 261 (1990).
[Crossref]

R. G. Smart, D. C. Hanna, A. C. Tropper, S. T. Davey, S. F. Carter, and D. Szebesta, Electron. Lett. 27, 1307 (1991).
[Crossref]

T. J. Whitley, C. A. Millar, R. Wyatt, M. C. Brierley, and D. Szebesta, Electron. Lett. 27, 1785 (1991).
[Crossref]

Izv. Akad. Nauk SSSR Neorg. Mater. (1)

A. A. Kaminskii, B. P. Sobolev, S. E. Sarkisov, G. A. Denisenko, V. V. Ryabehenkov, V. A. Fedorov, and T. V. Uvarova, Izv. Akad. Nauk SSSR Neorg. Mater. 18, 482 (1982).

J. Lightwave Technol. (1)

J. Miniscalco, J. Lightwave Technol. 9, 234 (1991).
[Crossref]

J. Lumin. (1)

W. E. Case, M. E. Koch, and A. W. Kueny, J. Lumin. 45, 351 (1990).
[Crossref]

Opt. Lett. (1)

Opt. Quantum Electron. (1)

A. A. Kaminskii, S. E. Sarkisov, F. Below, and H. J. Eichler, Opt. Quantum Electron. 22, S95 (1990).
[Crossref]

Phys. Status Solidi A (1)

F. Auzel, A. A. Kaminskii, and D. Meichenin, Phys. Status Solidi A 131, K63 (1992).
[Crossref]

Proc. Soc. Photo-Opt. Instrum. Eng. (1)

R. Beach, G. Albrecht, R. Solarz, W. Krupke, B. Comaskey, S. Mitchell, C. Brandle, and G. Berkstresser, Proc. Soc. Photo-Opt. Instrum. Eng. 1223, 160 (1990).

Other (5)

D. S. Knowles and H. P. Jenssen, Tech. Rep. 1 (MIT Laboratory for Advanced Solid State Laser Materials, Cambridge, Mass., 1991).

B. J. Dinerman and P. F. Moulton, in Conference Proceedings, LEOS ’92 (Lasers and Electro-Optics Society, Boston, Mass., 1992), paper SSLT 2.5, p. 310.
[Crossref]

G. C. Valley and R. A. McFarlane, in Advanced Solid-State Lasers, L. L. Chase and A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), p. 376.

R. J. Thrash and L. F. Johnson, in Compact Blue–Green Lasers Topical Meeting, Vol. 6 of 1992 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), paper ThB3; Annual Meeting, Vol. 23 of OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), paper MJ1.

R. A. McFarlane, in Advanced Solid-State Lasers, L. L. Chase and A. A. Pinto, eds., Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1992), p. 275.

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Figures (10)

Fig. 1
Fig. 1

Energy levels of Er3+, pump pathway options, and laser transitions.

Fig. 2
Fig. 2

(a) Extinction coefficient (optical density/cm) at room temperature for light polarized parallel to the (010) twofold axis. The upper states responsible for the absorption features are identified. (a) UV and visible. (b) Near IR.

Fig. 3
Fig. 3

Polarized fluorescence at room temperature on the 2P3/24I11/2 transition. The excitation is at 792 nm.

Fig. 4
Fig. 4

Polarized fluorescence at room temperature on the 4S3/24I15/2 transition. The excitation is at 792 nm.

Fig. 5
Fig. 5

Optical density of a 5-mm sample at 44 K polarized parallel to axis 2, the twofold axis. The figure shows the 4I15/24F7/2 transition.

Fig. 6
Fig. 6

Optical density of a 5-mm sample at 7 K polarized parallel to axis 1, the normal twofold axis. The figure shows the 4I15/22H11/2 transition.

Fig. 7
Fig. 7

Optical density of a 5-mm sample at 44 K polarized parallel to axis 1, the normal to the twofold axis. The figure shows the 4I15/22H11/2 transition.

Fig. 8
Fig. 8

Optical density of a 5-mm sample at 44 K polarized parallel to axis 2, the twofold axis. The figure shows the 4I15/24I9/2 transition.

Fig. 9
Fig. 9

Optical density of a 5-mm sample at 44 K polarized parallel to axis 1, normal to the twofold axis. The figure shows the 4I15/24I11/2 transition.

Fig. 10
Fig. 10

Excitation spectrum for a focused and an unfocused pump and the pumping wavelengths for laser emission. The new structure in the focused case matches the calculated ESA features associated with the 4I13/22H11/2 transition. The ■ show laser operation at the indicated wavelengths.

Tables (3)

Tables Icon

Table 1 Stark Level Energies of Er3+ in BaY2F8:Er 5%

Tables Icon

Table 2 Pump Wavelengths near 7900 Å for the Indicated Laser Operation

Tables Icon

Table 3 Pump Wavelengths near 9700 Å for the Indicated Laser Operation

Metrics