利用条形传递函数方法分析了二维扩散沟道光波导的传播特性，对两种典型折射率分布计算的数值结果与精确解及其它方法的结果进行了比较，表明该方法具有优于其它数值方法的精度 The propagation characteristics of two-dimensional diffused channel optical waveguides are analyzed by using the bar transfer function method. The comparison between the numerical results and the exact solutions of the two typical refractive index distributions and the results of other methods shows that the method has better performance than other numerical methods The accuracy