Linear and nonlinear optical properties of ZnGeP₂ crystal for infrared laser device applications: revisited

Abstract

Measurement of refractive indices in the spectral bands 9–11 µm and 1.32 µm from a cw CO₂ laser and a Q-switched Nd:YAG laser, respectively, is reported in a ZnGeP₂ crystal. A new set of Sellmeier dispersion relations has been derived from the measured refractive indices data in this crystal. Second-harmonic generation (SHG) of CO₂ laser radiation in this crystal is also reported. It is also seen that the previously reported phase-matching data for others experiments in SHG and optical parametric devices is explained satisfactorily with this new set of Sellmeier dispersion relation.

© 2003 Optical Society of America

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