基于蓝光半导体激光器的水下光学天线  

Underwater optical antenna based on blue semiconductor laser

作　　者：张可 郝坤坤 于超 韩腾飞 宋贺伦[2] 茹占强[2] 向阳[1] ZHANG Ke;HAO Kun-kun;YU Chao;HAN Teng-fei;SONG He-lun;RU Zhan-qiang;XIANG Yang(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130000,China;Suzhou Institute of Nanotechnology and Nanobionics,Chinese Academy of Sciences,Suzhou 215123,China;School of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]长春理工大学光电工程学院,吉林长春130000 [2]中国科学院苏州纳米技术与纳米仿生研究所,江苏苏州215123 [3]南京航空航天大学机电学院,江苏南京210016

出　　处：《激光与红外》2024年第9期1402-1409,共8页Laser & Infrared

基　　金：苏州市碳达峰碳中和科技支撑重点专项项目(No.ST202219);江苏省产业前瞻与关键核心技术攻关项目(No.BE2022021,No.BE2022057);纳米真空互联试验站(No.2018-000052-73-01-000356);江苏省“六大人才高峰”高层次人才项目(No.XYDXX-211)资助。

摘　　要：边缘发射半导体激光器在快慢轴方向发散角存在巨大差异,且具有固有像散,严重影响水下通信的传输距离,为此,本文基于高斯光束特性和准直扩束原理设计了一套由快慢轴准直器和伽利略扩束镜组成的水下激光光学天线系统,并对其进行了能量损失和发散角的仿真测试。根据测试结果表明,半导体激光器快慢轴方向的发散角分别从49°和9°压缩到了0.315 mrad和0.180 mrad,该天线系统可以实现水下传播100 m距离。降低了实际中快慢轴准直镜的校准和固定困难,快慢轴的Z轴公差在20μm内,探测器功率衰减<3.9%。此设计结构紧凑,便于加工装调,实际应用价值较高,有助于解决水下远距离传播时光能损耗严重和耦合效率偏低的问题。Edge-emitting semiconductor lasers have significant differences in the direction of fast and slow axes,and have inherent astigmatism,which seriously affects the transmission distance of underwater communication.Therefore,a set of underwater laser optical antenna system consisting of fast and slow-axis collimators and Galilean beam expander mirrors is designed based on the Gaussian beam characteristics and collimated beam expanding principle in this paper,and the simulation tests of energy loss and divergence angle are also carried out.According to the test results,the divergence angle in the direction of the fast and slow axes of the semiconductor laser is compressed from 49°and 9°to 0.315 mrad and 0.180 mrad,respectively.And the antenna system can achieve underwater propagation over a distance of 100 m.The difficulty of calibration and fixation of the fast and slow axis collimating mirror in practice is reduced,with a Z-axis tolerance of within 20μm for the fast and slow axes,and a detector power attenuation of less than 3.9%.This design is compact,easy to process and assemble,with high practical application value,which helps to solve the problems of severe energy loss and low coupling efficiency in underwater long-distance propagation.

关 键 词：准直扩束 光学设计 激光 高斯光束 快慢轴 

分 类 号：O439[机械工程—光学工程] TN249[理学—光学]