Second Harmonic Generation by periodic domain structure of nonlinear optical waveguide has been studied experimentally. Here reports a method for SHG.
本文研究了光轴周期反转结构光波导的实现方法，利用这种结构的光波导进行了非线性倍频实验。
The design domain of lath-shaped structure has a large length-width ratio, so it is difficult to obtain a solution or a clear and periodic topology configuration using the conventional algorithm.
板条状结构的设计域具有较大的长宽比，常规的拓扑优化方法无法获得清晰的、周期性的拓扑形式或求解困难。
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