单轴晶体三阶有效非线性系数的解析表达式

Third Order Effective Nonlinear Coefficients for Third Harmonic Generation in Uniaxial Crystals

应用压缩角标方法所得到的三阶非线性系数的矩阵形式，首次给出了在单轴晶体中进行三次谐波实验时，各种相位匹配方式下，其三阶有效非线性系数的解析表达式。

Using the compact matrix forms of third order susceptibility, we have derived the expressions of effective third order nonlinear coefficients for third harmonic generation (THG) processes in uniaxial crystals. These expressions are significant in finding the optimum incident directions for THG in uniaxial crystals.