An analysis is made of various phase-matched nonlinear laser devices utilizing ZnGeP 2 crystals with the chalocopyrite structure. The coefficients in the Sellmeier formula for the refractive indices of the crystal are given. Tuning curves of an optical parametric ZnGeP 2 oscillator are obtained for the case of pumping with two erbium laser lines.
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Bhar et al. (1987) studied this question.
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