Narrow Results

A theoretical analysis of the condition of scalar phase-matched second harmonic generation and optical parametric oscillation (OPO) in single-crystalline samples Zn_0.52Mg_0.48Se is presented. The calculated range of pumping for second harmonic generation with phase matching is 5.1-13 μm. The tuning range of the optical parametric oscillator based on Zn_0.52Mg_0.48Se is determined. The combination of active media and nonlinear converter for OPO in the same optical element are proposed.

In this work, parametric interaction is investigated with the account for phase change of interacting pump, signal and idler waves in the materials of infrared (IR) range of spectrum in case of Zn_1-xMg_xSe crystal. We give an analysis of the threshold intensity of pumping for Zn_0.75Mg_0.25Se crystal under conditions of the existing experiment, as well as the analytical expression for obtaining the optimum value of phase mismatch Δ_opt, at which maximum of signal wave reinforcement is reached. The values of refractive indices, angle of phase matching and angular dispersion coefficient of the first-order for Zn_0.52Mg_0.48Se have been calculated.