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Efficient second-harmonic generation and modal dispersion effects in orientation-patterned GaAs waveguides

机译:定向模式GaAs波导中的高效二次谐波产生和模态色散效应

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摘要

Efficient second-harmonic conversion of 4 (mu)m radiation was demonstrated in orientation-patterned GaAs (OPGaAs) waveguides (WGs). An experimentally corrected phase-matching curve for second harmonic generation (SHG) in OPGaAs WGs is presented. Influence of WG modes on the SHG process was studied. Two distinct types of SHG in the waveguides were identified and related to the TE and TM modes. Each type has its own dependence on pump polarization. The 21percent W~(-1) normalized conversion efficiency is within a factor of 0.75 from the predicted value for an ideal WG.
机译:在取向图案化的砷化镓(OPGaAs)波导(WGs)中证明了4μm辐射的有效二次谐波转换。提出了实验校正的OPGaAs WG中二次谐波(SHG)的相位匹配曲线。研究了WG模式对SHG过程的影响。确定了波导中SHG的两种不同类型,它们与TE和TM模式有关。每种类型对泵浦极化都有自己的依赖性。 21%的W〜(-1)归一化转换效率在理想WG的预测值的0.75倍以内。

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