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以线性耦合波方程为基础，分析了具有平面型结构的五光纤耦合系统的功率耦合特性，提出了研制新型结构的单模光纤１×４分束器的方法，并经实验验证。所研制的１×４分束器的性能和外形尺寸与常规的２×２单模光纤耦合器相比，都较为接近。
Based on the linear coupled wave equation, the power coupling characteristics of a five-fiber coupled system with a planar structure are analyzed. A new type of single-mode fiber 1 × 4 beamsplitter is proposed and verified by experiments. The performance and dimensions of the 1 × 4 beamsplitters developed are similar to those of conventional 2 × 2 single-mode fiber couplers.