大功率光纤耦合模块光学系统

• 作 者: 袁春生 刘洋洋 房玉锁 杜旭涛 徐会武 安振峰
• 机 构: 中国电子科技集团公司第十三研究所,河北工业大学信息工程学院,
• 出 处: 微纳电子技术
• 发表日期: 2015年04期
• 关键词: single emitter semiconductor laser ray tracing cylindrical lens coupling efficie

基于单管半导体激光器光束传输特性,用光线追迹法对光纤耦合光路进行仿真分析,结果表明在激光器与光纤间放置圆柱透镜的间接耦合方法具有成本低廉、准直光束质量好等特性。根据光束传输几何关系,优化得到了准直距离L与圆柱透镜半径r比值为0.5时,准直效果最好,准直后发散角为2.45°。用光学仿真软件设计耦合光路,并对耦合光路进行光线追迹,结合产品的可靠性问题,最终得到优化的柱透镜直径为60μm。进行耦合实验,测量准直后发散角和采用水冷散热的耦合系统的耦合效率,准直后发散角约为2.55°,耦合效率最高为89.50%。耦合实验结果与仿真结果接近,满足了光纤激光器泵浦源的使用要求。

Based on the transmission characteristics of the single-beam semiconductor laser beam, the ray tracing method was used to simulate the optical fiber coupling optical path. The results show that the indirect coupling method with the cylindrical lens placed between the laser and the optical fiber has the advantages of low cost and good collimated beam quality. According to the geometry of the beam transmission, the collimation effect is best when the ratio of the collimation distance L to the radius r of the cylindrical lens is 0.5, and the divergence angle after collimation is 2.45 °. The optical coupling software is used to design the coupling optical path, and the coupling optical path is traced by light. The optimized cylindrical lens diameter is 60μm with the reliability of the product. The coupling experiment was conducted to measure the coupling efficiency of the collimated divergence angle and the coupling system using water cooling. The divergence angle after collimation was about 2.55 ° and the coupling efficiency was up to 89.50%. The coupling experiment results are close to the simulation results and meet the requirements of the fiber laser pump source.