自由空间光通信系统中光源制备方案研究  

Reaserch on the optical source preparation scheme in free space optical communication system

作　　者：黄春晖[1] 王超[1] 

机构地区：[1]福州大学物理与信息工程学院,福州350116

出　　处：《光通信技术》2018年第2期38-41,共4页Optical Communication Technology

基　　金：国家自然科学基金(61177072)资助

摘　　要：利用单模光纤分路器和角锥棱镜构建了一个由径向阵列高斯光束制备平顶光的光学系统。该系统利用角锥棱镜的固有相干合成特性和谐振腔的非线性特性,保证了光束间的相位同步。分析了填充因子、腰束半径对合成光的光强分布的影响。根据自由空间光通信(FSO)长距离传播的需求,提出了环比功率作为合成平顶光质量的评价标准。进一步利用遗传学(GA)算法,优化合成平顶光的性能参数,保证合成平顶光具有小发散角、高能量集中度的优点。To prepare a flat-topped beam by radial array Gaussian beams, a single-mode fiber splitter and a corner cube prism are used to set up an optical system in this paper. Taking advantage of the coherent combining property of corner cube prism and nonliner characteristics of cavity resonator in our system, it was ensured that phase synchronization between beams. The relationship between the filing factor and the waist radius is analyzed. As the needs for long distance propagation based on free space optical communications（FSO）, the relative power ratio is proposed as the evaluation standard of flat-topped beam quality. Then the Genetic Algorithm（GA） is joined to optimize the coherent combining parameters of flat-topped beam, it ensures that the flat-topped beam has the advantages of small divergence angle and high energy concentration.

关 键 词：自由空间光通信 角锥棱镜 遗传算法 平顶光 

分 类 号：TN929.12[电子电信—通信与信息系统]