大气湍流对空间相干光通信的影响研究  

Influence Research of Atmospheric Turbulence on Space Coherent Optical Communications

作　　者：孔英秀[1,2] 柯熙政[1] 杨媛[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048 [2]西安工业大学光电工程学院,陕西西安710021

出　　处：《激光与光电子学进展》2015年第8期89-95,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61377080);陕西省"13115"科技统筹计划(2011KTCQ01-31);西安市科技成果转换基金(CX12165);陕西省自然科学基础研究计划(2013JQ8011);陕西省教育厅科研计划(2013JK1104);陕西省工业攻关科技计划(2013K06-08);江苏省省级前瞻性研究专项资金(第三批)(BE2013088)

摘　　要：光外差探测效率不仅与大气湍流有关,还与信号光及本振光在探测器光敏面上的分布特性有。对不同光场分布下大气湍流对外差效率的影响进行了分析对比,讨论了湍流影响下外差效率随探测器半径的变化关系。结果表明:当信号光和本振光为Airy+Gauss模型时,大气湍流对外差效率的影响最小,且外差效率达到最大值后不随探测器半径的增大而变化;Airy+平面波模型受湍流的影响最大,即使在弱湍流下外差效率下降也十分迅速,最大可下降95.13%。The efficiency of optical heterodyne detection is not only related to the atmospheric turbulence, but also related to the optical field distribution of the signal light and the local optical on the detector photosensitive surface. The influences of the atmospheric turbulence on that are studied when the signal light and the local optical field distributions are not the same, the change of the heterodyne efficiency along with the radius is disscussed. The conclusion shows that when signal and local optical field are Airy＋Gauss model, the influence of turbulence on the heterodyne efficiency is minimum, and will not change along with the detector radius after the efficiency is maximum. The influence of the turbulence is biggest under the Airy＋Plane wave model, even under the weak turbulence, the heterodyne efficiency falls very quickly, and the maximum value of the drop rate is 95.13%.

关 键 词：光通信 大气湍流 外差效率 光场分布 空间相干光通信 外差探测 

分 类 号：TN929.12[电子电信—通信与信息系统]