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分析研究了熔锥型光纤耦合器微米量级下波导结构的光传输特性,利用光束传播法对光功率在光纤间能量分布进行数值模拟,得到了不同拉伸长度下耦合器输出光功率变化规律。以熔融拉锥方法为制作熔锥型光纤耦合器的实验平台,分析了在10mm到35mm拉伸长度范围内耦合器与附加损耗和插入损耗偏差的参数关系;并利用光谱特性测试光纤耦合器的性能参数:插入损耗、附加损耗。理论模拟和实验研究数据发现:拉伸长度在20mm左右时,耦合器的光学性能相对较好,说明该长度下熔锥型耦合器的光学性能稳定良好,并为进一步优化熔锥型光纤耦合器的制作技术和工艺提供有益参考。
The optical transmission characteristics of the waveguide structure on the micron scale of fused-tapered fiber coupler were analyzed and studied. The energy distribution of the optical power between the fibers was numerically simulated by the beam propagation method. The variation of the output optical power of the coupler under different stretching lengths . The fusion taper method was used to fabricate a fused-tapered fiber optic coupler. The relationship between the coupler and additional loss and insertion loss deviation was analyzed in the range of 10mm to 35mm. The spectral characteristics of the fiber coupler Performance parameters: insertion loss, additional loss. The theoretical simulation and experimental data show that the optical performance of the coupler is relatively good when the tensile length is about 20mm, which shows that the optical performance of the coupler is stable and good. In order to further optimize the FLC coupler The production technology and process provide a useful reference.