电光效应下KDP晶体的三倍频折返特性分析  

Retracing Properties of Third-Harmonic Generation in KDP Crystal Based on Electro- Optic Effect

作　　者：杨义胜[1] 王 陶承刚[1] 马俊青[1] 

机构地区：[1]中国人民解放军68129部队,甘肃兰州730060

出　　处：《光学应用（中英文版）》2013年第4期63-67,共5页Journal of Optics Applications

摘　　要：分析了电光效应下的KDP晶体色散特性以及三倍频折返特性。通过数值分析不同外加电场作用下Ⅰ类和Ⅱ类KDP晶体的折返曲线和群速度曲线，验证了利用晶体电光效应改变晶体三倍频折返点波长、实现可调谐三倍频折返点匹配的可行性。模拟结果显示，在外加电场作用下，Ⅰ、Ⅱ类KDP晶体的三倍频折返点波长可调谐范围分别可以达到[1．431μm，1．491μm]、[1．497μm，1．631μm]；外加电场值在[-0．1，0．5]之间变化时，三倍频折返点波长变化最快，随着外加电场值的继续增大折返点波长变化趋缓。Dispersion properties as well as retracing properties of Third-harmonic Generation （THG） in KDP crystal have been studied under electro-optic effect in this paper; specifically, through the numerical analysis on, group-velocity and third-harmonic （TH） retracing curves of I and II type of KDP crystal in different external electric fields, the feasibility to achieve tunable TH retracing wavelengths has been verified under electro-optic effect. The simulation results indicated that by applying external voltages, corresponding tunable ranges of TH retracing wavelength of Type I and Type II KDP crystals can reach [1.431 μm, 1.491 μm] and [1.497 μm, 1.631 μm], respectively, and that when the applied external voltage was within the range of [-0.1, 0.5], TH retracing wavelengths experienced the most significant change; then fiat as the external voltage continued increasing.

关 键 词：非线性光学 三倍频 折返点匹配 电光效应 

分 类 号：TN124[电子电信—物理电子学]