海上大气湍流中光束漂移模型分析  

Modeling and Analysis of Beam Wander in Maritime Atmospheric Turbulence

作　　者：王红星[1,2] 吴晓军[1,2] 宋博[1,2] 

机构地区：[1]海军航空工程学院电子信息工程系,山东烟台264001 [2]山东省信号与信息处理重点实验室,山东烟台264001

出　　处：《中国激光》2016年第2期223-234,共12页Chinese Journal of Lasers

基　　金：山东省"泰山学者"建设工程专项经费(ts20081330);山东省自然科学基金(ZR2013FQ010)

摘　　要：光束漂移是激光在大气湍流中传输时的一个重要效应。基于海上大气折射率起伏功率谱模型,推导得出了该环境大气湍流中水平路径光束漂移的理论表达式;为了分析所建立模型的适用性,利用CCD成像技术,在烟台地区近海面环境下开展了多次激光传输实验,分别采集到了不同时间段和不同距离的准直高斯光束漂移实测数据,在弱起伏条件下,将理论预测值与实际测量值进行比较,分析结果表明:两者之间的相对误差值全部低于16%,说明所建立的海上环境光束漂移理论模型能够与实测值较好地吻合。所得到的研究结果将为研究海上环境下光束漂移问题提供更加准确的理论模型。Beam wander is an important effect when a beam propagates in atmospheric turbulence. Based on the marine atmospheric refractive index fluctuation power spectrum, a new theoretical expression is developed for a horizontal propagation path in maritime atmospheric environment. In order to validate the model, a set of measurements of beam wander for a collimated Gaussian beam is carried out using CCD technique during multiple laser transmissions under the sea surface environment in Yantai region, and the experiments are conducted at different time and various ranges. By comparing the theoretical value with measured value under the weak fluctuation condition, the results show that the relative errors between them are below16%, and the estimation given by the new theoretical expression generally provides a good fit with the data. According to the conclusion of this paper, the beam wander in the maritime atmospheric turbulence can be more accurately predicted.

关 键 词：大气光学 激光传输 大气湍流 海上环境 折射率起伏功率谱 光束漂移 相对误差 

分 类 号：TN929.12[电子电信—通信与信息系统]