基于ZnSe和GaP晶体非共振菲涅耳相位匹配和频产生可调谐中红外辐射的理论研究

Based on the theory of nonresonant Fresnel phase matching (FPM),tuning characteristics of second-harmonic generation (SHG) wave,the full-width at half-maximum (FWHM) acceptance bandwidth for total internal reflection angle,and the effective nonlinear coefficient of sum-frequency generation in ZnSe and GaP crystals are calculated under different polarization configurations. In theoretical calculation,the parameters,which have been reported to generate the tunable infrared waves by SHG in experime