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继研制成功单模脊形锗硅合金光波导后，进一步用这种光波导试制Ｙ分支器．文中用束传播法ＢＰＭ首先从理论上分析了波长λ＝１．３μｍ的光波在分支器中的传播特性，模拟计算了模场的传播及损耗．其次叙述了实际锗硅Ｙ分支器的制造工艺及测量结果．结果表明，激光束耦合进锗硅分支器的输入端后，分支器的二路输出端成功输出均匀的单模光波．
Following the successful development of a single-mode ridge silicon germanium alloy optical waveguide, the Y waveguide is further manufactured using this optical waveguide. In this paper, the beam propagating method BPM is used to analyze the propagation characteristics of the light wave with wavelength λ = 1.3μm in the splitter. The propagation and loss of the mode field are simulated. Second, the actual manufacturing process of silicon germanium Y splitter and measurement results are described. The results show that after the laser beam is coupled into the input of silicon germanium splitter, the output of the splitter can output a uniform single-mode light wave successfully.