基于光束传播法，对几种只沿纵向变化的锥形过渡波导的传输特性进行了分析。
The propagation characteristics of several kinds of laterally tapered transitional waveguides are analyzed using the beam propagation method(BPM).
运用傅立叶光学理论建立高斯光束的离散化模型，并用这个模型计算了双弯曲金属波导的传输效率。
A discrete model of Guassian beam is established based on Fourier Optics principles. The transfer efficiency of dual bending waveguide is obtained by using this model.
采用光束传输矩阵法详尽地分析了光束在波导中的传输方式，模场分布。
The optical beam transfer matrix method is used to analyze the transfer manners and the distribution of waveguide modal field in detail.
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