2-um laser damage and 3-6 um optical parametric oscillation in AgGaSe2

Madhu A. Acharekar; L. H. Morton Jr.; Eric W. Van Stryland

doi:10.1117/12.180911

28 July 1994 2-μm laser damage and 3-6 μm optical parametric oscillation in AgGaSe₂

Madhu A. Acharekar, L. H. Morton Jr., Eric W. Van Stryland

Proceedings Volume 2114, Laser-Induced Damage in Optical Materials: 1993; (1994) https://doi.org/10.1117/12.180911
Event: Laser-Induced Damage in Optical Materials: 1993, 1993, Boulder, CO, United States

Abstract

We have demonstrated a silver gallium selenide (AgGaSe₂) based optical parametric oscillator (OPO) tunable from 2.75 micrometers to longer than 6 micrometers (limited by the measuring spectrometer) with greater than 1 mJ per pulse output energy in this range. The crystal used was 8 X 8 X 27 mm. We used a 60 mJ, near Gaussian, 2.09 micrometers chromium, thulium, holmium doped YAG (CTH:YAG) laser pump source, Q-switched by an AO modulator to produce approximately 50 ns pulses. As with most OPO's the output energy is limited by damage to the nonlinear crystal. We measured the damage threshold of both coated and uncoated surfaces to be approximately 0.9 J/cm² and 1.2 J/cm² respectively.

Citation Download Citation

Madhu A. Acharekar, L. H. Morton Jr., and Eric W. Van Stryland "2-μm laser damage and 3-6 μm optical parametric oscillation in AgGaSe₂", Proc. SPIE 2114, Laser-Induced Damage in Optical Materials: 1993, (28 July 1994); https://doi.org/10.1117/12.180911

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