We report the temperature dependence of a continuous-wave noncritically phase-matched (θ=90°) optical parametric amplifier based on a 15-mm-long silver gallium sulfide crystal (AgGaS2) pumped by a 50-mW near-IR AlGaAs diode laser (λ3=0.843 μm). This amplifier is idler seeded by a 15-mW KCl:Li (FA-II) color-center laser (λ1=2.53 μm) and produces microwatt-range power of a signal radiation at λ2=1.265 μm. Updated linear and thermo-optic data of this chalcopyrite material, such as its room-temperature refractive indices and their temperature dependence, are devised from this type I (eoo) 3:1 frequency-division process and from other published data on noncritically phase-matched difference-frequency generation. The resulting dno, e/dT values reproduce fairly well all of the reported results on temperature phase-matched parametric mixing.
© 1997 Optical Society of America
J.-J. Zondy and D. Touahri, "Updated thermo-optic coefficients of AgGaS2 from temperature-tuned noncritical 3ω ω → 2ω infrared parametric amplification," J. Opt. Soc. Am. B 14, 1331-1338 (1997)