我们建立了一套描述聚丁二炔晶体中的三阶非线性光学过程的数学公式。
We derived a set of mathematical formulas for describing the third-order nonlinear optical process in polydiacetylene crystals.
本文比较了无机、有机、半有机三类非线性光学晶体的性能、研究进展以及面临的主要问题和发展趋势；
The properties, the research progress and the development trend of inorganic, organic and semi-organic nonlinear optical crystals are discussed in detail in this paper.
在对非线性变频晶体的研究中，首先介绍了非线性光学晶体的光学特性，详细介绍了几种常用的中红外非线性晶体。
The optical characteristics of nonlinear optical crystals, especially several common mid-IR nonlinear crystals have been introduced in the research of nonlinear frequency conversion crystals.
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