本文得到了沿一线性介质与非线性介质界面传输的ＴＭ波精确的色散关系和传播常数的解析计算公式，导出了计算非线性介质中传输功率流的积分公式.本文方法计算传播常数及功率流的优点是可不必先知道电场分布.

Exact dispersion relations and an analytic formula for calculating propagation constant and the power flux for TM guided waves at a nonlinear interface have been obtained. The advantage of this method is that the detailed field distrubutions are not necessarily known for solving the dispersion relations and also for calculating the power flux.