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The nonlinear-optical characteristics of AgGa1-xInxSe2 crystals with x = 0.25–0.34 are studied. The experimental dependence of the wavelength of noncritical phase matching on the indium concentration is obtained upon second-harmonic generation by pumping the crystal by a CO2 laser. The quadratic nonlinear susceptibility is measured by the absolute method. The radiation resistance threshold for pulsed radiation from the CO2 laser is determined.
Badikov et al. (Thu,) studied this question.
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