光功率均分耦合器离子交换平面光波导的温度应力特性研究

Temperature stress characteristics of ion exchange planar optical waveguides in optical splitters

文章以1×5 PLC-MMI光功率均分耦合器为例,利用自成像理论和数值仿真方法,分析离子交换平面光波导无源器件的温度应力特性。研究了工作于850nm时器件各端口插入损耗、附加损耗与多模波导区长度和折射率变化的关系,分析了由于环境温度变化和外部应力而引起的波导变形和折射率变化,得到了因此而出现的光纤-波导耦合损耗、双折射等对MMI功率均分特性的影响。研究结果表明,文章研制的1×5 PLC-MMI光功率均分耦合器性能稳定,环境和应力对其影响小。

The temperature-stress characteristics of passive devices(ion exchange planar optical waveguides)is investigated employing the self imaging theory and numerical simulation methods with the 1×5 PLC-MMI optical power splitterconsidered as an example The dependences of the insertion loss and additional loss of each port of the device on the length and refractive index change of multimode waveguide region when the device operates at 850 nm are studied.The waveguide deformation and index change due to the environmental temperature and stress are analyzed,and consequently,the splitting ratio of the MMI splitter is discussed due to the optical fiber-waveguide coupling loss and birefringence.All the results indicate that the developed 1×5 PLC-MMI optical power splitter demonstrates stable performance with excellent immunization to the influence of environment and stress.