基于耦合模理论 ,分析了考虑传输损耗的条形波导中切伦科夫 (Cherenkov)二次谐波 (SHG)的问题。结果表明 ,转换效率具有指数性质和饱和性质。这一结果不同于未考虑传输损耗时转换效率所具有的线性性质 ,这对于切伦科夫频率倍频器的研制中参数的优化具有重要的意义 Based on the coupled-mode theory, the problem of Cherenkov second harmonic (SHG) in strip waveguide considering the transmission loss is analyzed. The results show that the conversion efficiency has exponential and saturation properties. This result is different from the linear nature of the conversion efficiency without consideration of transmission loss, which is of great significance for the optimization of parameters in the development of the Cerenkov frequency doubler