Abstract

We report the demonstration of a cw AgGaS2 optical parametric oscillator (OPO). The subharmonic 3ω2ω+ω OPO is configured as a doubly resonant oscillator with weak pump enhancement. The temperature-tuned, noncritically phase-matched crystal is pumped by a diode laser at λp845 nm. Oscillation at λs1267 nm and λi2535 nm is observed at an input threshold power of 60 mW. Crystal thermal loading induces a robust passive self-frequency stabilization of any single-axial-mode pair to the OPO cavity resonance. The conversion efficiency is limited by thermal effects to 2% for a 200-mW pump input.

© 1998 Optical Society of America

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