Abstract

We introduce a new low-loss fast intracavity semiconductor Fabry–Perot saturable absorber operated at antiresonance both to start and sustain stable mode locking of a cw-pumped Nd:YLF laser. We achieved a 3.3-ps pulse duration at a 220-MHz repetition rate. The average output power was 700 mW with 2 W of cw pump power from a Ti:sapphire laser. At pump powers of less than 1.6 W the laser self-Q switches and produces 4-ps pulses within a 1.4-μs Q-switched pulse at an ≈150-kHz repetition rate determined by the relaxation oscillation of the Nd:YLF laser. Both modes of operation are stable. In terms of coupled-cavity mode locking, the intracavity antiresonant Fabry–Perot saturable absorber corresponds to monolithic resonant passive mode locking.

© 1992 Optical Society of America

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References

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1991

1990

1989

M. N. Islam, E. R. Sunderman, I. Bar-Joseph, N. Sauer, T. Y. Chang, Appl. Phys. Lett. 54, 1203 (1989).
[CrossRef]

P. N. Kean, X. Zhu, D. W. Crust, R. S. Grant, N. Langford, W. Sibbett, Opt. Lett. 14, 48 (1989).
[CrossRef]

1985

’tHooft, G. W.

Bar-Joseph, I.

M. N. Islam, E. R. Sunderman, I. Bar-Joseph, N. Sauer, T. Y. Chang, Appl. Phys. Lett. 54, 1203 (1989).
[CrossRef]

Chang, T. Y.

M. N. Islam, E. R. Sunderman, I. Bar-Joseph, N. Sauer, T. Y. Chang, Appl. Phys. Lett. 54, 1203 (1989).
[CrossRef]

Chiu, T. H.

U. Keller, T. H. Chiu, “Resonant passive mode-locked Nd:YLF laser,” IEEE J. Quantum Electron. (to be published).

Cho, A. Y.

Crust, D. W.

Cunningham, J. E.

Feugnet, G.

D. K. Negus, L. Spinelli, N. Goldblatt, G. Feugnet, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1991), p. 120.

Goldblatt, N.

D. K. Negus, L. Spinelli, N. Goldblatt, G. Feugnet, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1991), p. 120.

Grant, R. S.

Haus, H. A.

Islam, M. N.

M. N. Islam, E. R. Sunderman, I. Bar-Joseph, N. Sauer, T. Y. Chang, Appl. Phys. Lett. 54, 1203 (1989).
[CrossRef]

Kean, P. N.

Keller, U.

Knox, W. H.

Langford, N.

Miller, D. A. B.

Negus, D. K.

D. K. Negus, L. Spinelli, N. Goldblatt, G. Feugnet, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1991), p. 120.

Piché, M.

Roskos, H.

Salin, F.

Sauer, N.

M. N. Islam, E. R. Sunderman, I. Bar-Joseph, N. Sauer, T. Y. Chang, Appl. Phys. Lett. 54, 1203 (1989).
[CrossRef]

Sibbett, W.

Silberberg, Y.

Sivco, D. L.

Smith, P. W.

Spence, D. E.

Spinelli, L.

D. K. Negus, L. Spinelli, N. Goldblatt, G. Feugnet, in Digest of Conference on Advanced Solid-State Lasers (Optical Society of America, Washington, D.C., 1991), p. 120.

Squier, J.

Sunderman, E. R.

M. N. Islam, E. R. Sunderman, I. Bar-Joseph, N. Sauer, T. Y. Chang, Appl. Phys. Lett. 54, 1203 (1989).
[CrossRef]

Woodward, T. K.

Zhu, X.

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Figures (4)

Fig. 1
Fig. 1

End-pumped Nd:YLF laser cavity design.

Fig. 2
Fig. 2

Low-intensity reflectivity: curve (a), AlAs/GaAs dielectric mirror; curve (b), InGaAs/GaAs saturable absorber layer (uncoated) and AlAs/GaAs dielectric mirror; curve (c), A-FPSA with a free spectral range of ≈138 nm.

Fig. 3
Fig. 3

Autocorrelation of the cw mode-locked Nd:YLF laser.

Fig. 4
Fig. 4

Microwave spectrum analyzer results: relaxation oscillations appear as modulation sidebands around the pulse repetition frequency of 219.4 MHz for (a) a cw mode-locked Nd:YLF laser (2.2-W pump power) and (b) a cw mode-locked and Q-switched Nd:YLF laser (1.4-W pump power). The frequency span is 1 MHz, and the resolution bandwidth is 10 kHz.

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