准位相匹配材料研究新进展及应用

NEW DEVELOPMENTS AND APPLICATIONS OF QUASI-PHASE-MATCHED MATERIAL

准位相匹配材料 (光学超晶格 )是一种人工非线性光学材料 ,目前已被广泛应用于倍频、三倍频、光参量振荡等激光变频领域 .这种材料可以通过提供倒格矢来满足非线性光学过程中的位相失配 ,从而提高非线性光学过程转换效率 .文章简要回顾了准位相匹配理论的发展过程 ,对其基本原理及主要应用做了较为详细的描述 。

Quasi-phase-matched crystals(optical superlattices) are a type of artificial nonlinear optical material which has recently attracted much attention on account of its wide application in nonlinear frequency conversion such as second-harmonic generation, third-harmonic generation and optical parametric oscillation. A review is presented of the theory of quasi-phase-metching and the main achievements in this field.