提出一种紧密级联型1×N光功率分配器的设计方案。该光功率分配器由N-1个1×2光功率分配器单元级联构成,相邻单元之间以单段圆弧波导衔接,末级单元与光纤接口间以两段圆弧衔接。通过采用遗传算法对结构参数进行优化,使得器件总长度最小,提高了集成度。BPM仿真结果表明,与传统功率分配器相比,该功率分配器的尺寸和插入损耗均较大减小。 A compact cascade type 1 × N optical power splitter design is proposed. The optical power divider consists of N-1 1 × 2 optical power divider units connected in cascade. Adjacent units are connected by a single circular arc waveguide, and the end unit and the optical fiber interface are connected by two arcs. By using genetic algorithm to optimize the structure parameters, the total length of the device is minimized and the integration is improved. BPM simulation results show that compared with the traditional power splitter, the power splitter size and insertion loss are greatly reduced.