Abstract

We measured small-signal gain in a cw diode-pumped Cr:LiSAF and showed that upconversion and thermal quenching of fluorescence strongly limit small-signal gain. Then we optimized the gain in a Cr:LiSAF laser pumped by two 400-mW red diodes. In Q-switched operation, this laser produced tunable nanosecond pulses between 800 and 900 nm. At 850 nm, we obtained 230-ns pulses with an energy of 6.5 μJ at a repetition rate of 10 kHz.

© 1996 Optical Society of America

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References

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1995

1994

1992

1990

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[CrossRef]

1989

A. J. Alfrey, IEEE J. Quantum Electron. 25, 760 (1989).
[CrossRef]

1966

D. Findlay, R. A. Clay, Phys. Lett. 20, 277 (1966).
[CrossRef]

Alfrey, A. J.

A. J. Alfrey, IEEE J. Quantum Electron. 25, 760 (1989).
[CrossRef]

Balembois, F.

Bass, M.

Beach, R. J.

Beaud, P.

Brown, B.

Brun, A.

Cassanho, A.

M. A. Noginov, H. P. Jenssen, A. Cassanho, Advanced Solid-State Lasers, Vol. 15 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1993), p. 376.

Chai, B. H. T.

Chen, Y. F.

Clay, R. A.

D. Findlay, R. A. Clay, Phys. Lett. 20, 277 (1966).
[CrossRef]

DeLoach, L. D.

Falcoz, F.

Fields, R. A.

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[CrossRef]

Fincher, C. L.

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[CrossRef]

Findlay, D.

D. Findlay, R. A. Clay, Phys. Lett. 20, 277 (1966).
[CrossRef]

Georges, P.

Innocenzi, M. E.

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[CrossRef]

Jenssen, H. P.

M. A. Noginov, H. P. Jenssen, A. Cassanho, Advanced Solid-State Lasers, Vol. 15 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1993), p. 376.

Keller, U.

Krupke, W. J.

Kway, W. L.

Noginov, M. A.

M. A. Noginov, H. P. Jenssen, A. Cassanho, Advanced Solid-State Lasers, Vol. 15 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1993), p. 376.

Payne, S. A.

Rapoport, W. R.

W. R. Rapoport, in Advanced Solid-State Lasers, Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington D.C., 1992), p. 21.

Richardson, M.

Rytz, D.

Smith, L. K.

Solarz, R. W.

Stalder, M.

Tassano, J. H.

Weingarten, K. J.

Yura, H. T.

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[CrossRef]

Appl. Opt.

Appl. Phys. Lett.

M. E. Innocenzi, H. T. Yura, C. L. Fincher, R. A. Fields, Appl. Phys. Lett. 56, 1831 (1990).
[CrossRef]

IEEE J. Quantum Electron.

A. J. Alfrey, IEEE J. Quantum Electron. 25, 760 (1989).
[CrossRef]

J. Opt. Soc. Am. B

Opt. Lett.

Phys. Lett.

D. Findlay, R. A. Clay, Phys. Lett. 20, 277 (1966).
[CrossRef]

Other

W. R. Rapoport, in Advanced Solid-State Lasers, Vol. 13 of OSA Proceedings Series (Optical Society of America, Washington D.C., 1992), p. 21.

M. A. Noginov, H. P. Jenssen, A. Cassanho, Advanced Solid-State Lasers, Vol. 15 of OSA Proceedings Series (Optical Society of America, Washington, D.C., 1993), p. 376.

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Figures (6)

Fig. 1
Fig. 1

Experimental setup for small-signal gain measurement.

Fig. 2
Fig. 2

Small-signal gain evolution as a function of the absorbed pump power under krypton pumping. Curves a, b, and c are for calculated small-signal gain without any limitations, with only the upconversion process, and with upconversion and thermal quenching of fluorescence, respectively.

Fig. 3
Fig. 3

Pumping scheme in the case of one laser diode. F, focal length; ON, numerical aperture.

Fig. 4
Fig. 4

Small-signal gain evolution as a function of the absorbed pump power under diode pumping.

Fig. 5
Fig. 5

Experimental setup for a Cr:LiSAF laser pumped on both sides by two laser diodes. O1–O3, objectives.

Fig. 6
Fig. 6

Energy per pulse as a function of the pump power in Q-switched operation.

Equations (2)

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R ( θ ) = R pl [ 1 ( n cos θ cos θ ' n cos θ + cos θ ' ) 2 ] 4 , sin θ ' = sin θ / n .
G 0 R ( θ ) = 1 .

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