自由空间光-布拉格光纤耦合效率仿真分析

根据电磁场模场匹配理论，分析了自由空间光-布拉格光纤的耦合效率。通过对空间光-布拉格光纤耦合效率的计算可以知道，耦合效率与布拉格光纤纤芯半径、焦点光斑光腰半径和纤芯波矢有关。通过优化合理选择空间光聚焦后光腰半径与布拉格光纤纤芯半径以及纤芯波矢可以有效提高耦合效率。本文还对外界振动造成耦合透镜与布拉格光纤对接不正而对空间光-布拉格光纤耦合效率影响进行了分析。这对光纤激光雷达系统以及空间光通信系统的空间光-布拉格光纤耦合效率分析具有极其重要的参考价值。

Simulation analysis for coupling ratio of spatial light to Bragg fiber

Based on the mode matching theory of electromagnetic field,the coupling efficiency of light from free space to Bragg fiber has been analyzed.It shows that the coupling efficiency is related to the core radius of Bragg fiber,the radius of focused facular and wave vector of the core.By optimizing the value of these parameters appropriately,the coupling efficiency can be improved.Simultaneously,the displacement between coupling lens and Bragg fiber is caused by the external vibration.The changed coupling efficiency caused by it has been analyzed.It plays an important role in analyzing the coupling efficiency of Bragg fiber,which can be applied to the fiber lidar system and optical communication system.