非线性光学系数
Different relationships between principal-axes and crystallographic-physical-axes result in different expressions of the effective nonlinear optical coefficient.
由于晶体的折射率主轴与其晶体物理主轴有著不同的配对方式,其三阶有效非线性系数计算公式将发生变化.
If we introduce the aperiodic or periodic reversal of the nonlinear optical coefficient into the waveguides, the CSHG conversion efficiency can be improved greatly, the configuration also has been called quasi-phase matched CSHG ( QPM-CSHG).
如果引入二阶非线性系数的周期极化反转,即考虑到准相位匹配的情况,切伦科夫倍频效率将会得到极大的提高,可以将之称为准相位切伦科夫倍频(QPM-CSHG)。
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