Variations in refractive indices with temperature, the thermo-optic coefficients and temperature-dependent absorption in AgGaSe 2 crystal have been measured. Good agreement between the theory and experiment has been found for the temperature-dependence of phase-matching angles for second-harmonic generation of CO 2 laser radiation in this crystal. Hence variations of the phase-matching angle with temperature in some important nonlinear devices have also been estimated.
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Bhar et al. (1994) studied this question.
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