A new method of analyzing three waves interaction in nonlinear periodically poled crystals (PP-crystals) on the theorem of quasi-phase-matching, called the vector superposing method is presented.

• 摘要从准相位匹配的基本原理出发，提出了一种研究周期极化介质中二阶非线性的三波互作用现象的分析方法-矢量叠加法。