利用变分方法对钛扩散c切Nd：LiNbO3波导激光器的1085和815 nm TM导模和有效折射率进行了分析．计算了几个低阶TM模式的模场尺寸和相应的有效折射率随波导制备参数(初始钛条宽度W，扩散温度T和初始钛条厚度H)的变化关系，讨论了波导的单模条件和截止条件．所得理论结果与以前所报导的实验数据进行了比较．
An analysis of TM mode and effective refractive index in c-cut Ti-diffused Nd:LiNbO3 strip waveguide lasers has been carried out at the laser wavelength 1085 nm and pump wavelength 815 nm by using variational technique. The mode size and effective refractive index as function of the controllable waveguide fabrication parameters(initial Ti-strip width W, diffusion temperature T and initial Ti-strip thickness H) have been calculated for several lower-order modes. The single-mode and cut-off conditions were discussed. The numerical results are compared with previously published experimental data.
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