扭曲椭圆高斯谢尔模光束的自修复特性  

Self-Healing Properties of Twisted Elliptical Gaussian Schell-Model Beams

作　　者：郭寅龙 聂芯雨 李晋红[1] 钱仙妹[2] 朱文越[2] 王静 Guo Yinlong;Nie Xinyu;Li Jinhong;Qian Xianmei;Zhu Wenyue;Wang Jing(School of Applied Science,Taiyuan University of Science and Technology,Taiyuan 030024,Shanxi,China;Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,Anhui,China)

机构地区：[1]太原科技大学应用科学学院,山西太原030024 [2]中国科学院合肥物质科学研究院安徽光学精密机械研究所中国科学院大气光学重点实验室,安徽合肥230031

出　　处：《激光与光电子学进展》2023年第17期117-125,共9页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11904253);太原科技大学科研启动基金(20202013);山西省中央引导地方科技发展资金(YDZX20201400001386);中国科学院大气光学重点实验室开放课题基金(HTAD-JJ-19-02);太原科技大学研究生教育创新项目(SY2022081)。

摘　　要：基于Collins公式推导了扭曲椭圆高斯谢尔模光束在经过高斯吸收型障碍物后传输的场分布解析表达式,得到了一种有效增强光束自修复能力的基础扭曲光束模型,分析了光源各参数对光束自修复特性的影响,揭示了光束强度、相干度和轨道角动量通量密度在被障碍物部分遮挡后传输的规律以及三者之间的内在联系,解释了扭曲光束自修复特性的内在原理。研究表明,适当减小相干长度和扭曲因子可以在保留扭曲光束特性的同时增强光束的自修复能力。该研究结论有助于优化部分相干光在自由空间传输的整体性能,在自由空间光通信、激光雷达、遥感成像等领域具有潜在的应用价值。In this study,the analytical expression of field distribution of twisted elliptical Gaussian Schell-Model beams after they pass through a Gaussian absorption-type obstacle is derived based on the Collins formula,and a basic twisted-beam model is obtained that effectively enhances the beam’s self-healing capability.The effects of the light source parameters on the beam’s self-healing properties are analyzed.The laws of intensity,coherence,and orbital angular momentum flux density transmitted when partially blocked by obstacles and the intrinsic connection among the three quantities are revealed.The intrinsic self-healing properties of twisted beams are explained.It is shown that appropriately reducing the coherence length and twist factor can enhance the beam’s self-healing capability while preserving the characteristics of the twisted beam.The findings can help optimize the overall performance of partially coherent light transmission in free space,thus enhancing potential applications in free space optical communication,LIDAR,remote sensing imaging,and other fields.

关 键 词：相干光学与统计光学 激光传输 部分相干光 扭曲相位 轨道角动量 自修复 

分 类 号：O436[机械工程—光学工程] TN929.12[理学—光学]