强激光与粒子束, 2005, 17 (12): 1799, 网络出版: 2006-04-28   

湍流大气中激光聚焦光束后向散射的数值模拟

Numerical simulation of backscattering of a focused laser beam in turbulent atmosphere
作者单位
1 中国科学院安徽光学精密机械研究所,大气光学中心,安徽,合肥,230031
2 上海交通大学图像处理与模式识别研究所,上海,200240
摘要
对基于聚焦光束后向散射到达角起伏的湍流测量进行了数值模拟.通过近轴标量波动方程和分形相屏算法,提出了聚焦光束二次传输的数值模型,分别就固定点信标光源和聚焦光束后向散射的到达角起伏方差的统计特征进行了分析,并取得了很好的相关性,得出了可以从聚焦光束的回波图像信号里提取大气湍流信息的结论.讨论了聚焦距离对固定点光源和回波光束的到达角起伏方差相似度的影响.
Abstract
A method of measuring the atmospheric turbulence based on the arrival angle fluctuation of a focused laser beam backscattering was numerically simulated.Based on the paraxial scalar wave equation and a fractal phase-screen algorithm a simu-lation model for the focused laser beam propagating along a fold path was proposed.With a constant Fried length,the arrival angle fluctuation variance was analyzed between the focused laser beam backscattering and the fixed point-source as reference beacon.A relatively high correlation between them was obtained.The simulation results were verified by experimental data.
参考文献

[1] Lukin V P,Fortes B V.Adaptive beaming and imaging in the turbulent atmosphere[M].Bellingham:SPIE Press,2002.135-141.

[2] 塔塔尔斯基 V I.湍流大气中波的传播理论[M].北京:科学出版社,1978.86-102.
Tatarskii V I.Wave propagation in a turbulent medium.Beijing:Science Press,1978.86-102

[3] Fleck J A,Morris J R,Feit M D.Time-dependent propagation of high energy laser beams through the atmosphere[J].Appl Phys,1976,10(1):129-139.

[4] Martin J M,Flatte S M.Intensity images and statistics from numerical simulation of wave propagation in 3-D random media[J].Appl Opt,1988,27(11):2111-2126.

[5] Martin J M,Flatte S M.Simulation of point-source scintillation through three-dimensional random media[J].J Opt Soc Am A,1990,7(5):838-847.

[6] 王英俭,吴毅.扩展物体漫反射光传输及成像的数值模拟研究[J].光学学报,1998,18(8):1470—1472.
Wang Y J,Wu Y.Numerical simulation of propagation of diffuse reflection light of extended object.Acta Optica Sinica,1998,18(8):1470-1472

[7] 王英俭.激光大气传输及其位相补偿的若干问题探讨[D].合肥:中科院安徽光学精密机械研究所,1996.
Wang Y J.Some study on the laser propagation in the atmosphere and its phase compensation.Doctor dissertation.Hefei:Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,1996

[8] 黄印博,王英俭.热晕效应数值模拟中对计算参数的选取[J].强激光与粒子束,2005,17(1):1-4.
Huang Y B,Wang Y J.Choosing computing parameters in the numerical simulation of thermal blooming effects.High Power Laser and Particle Beams,2005,17(1):1-4

[9] Wang D S,Cao L.Chaos,fractal and the applications[M].Hefei:USTC Press,1995.245-260.

[10] Schwartz C,Baum G,Ribak E N.Turbulence-degraded wave fronts as fractal surfaces[J].J Opt Soc Am A,1994,11(1):444-451.

[11] Noll R J.Zernike polynomials and atmospheric turbulence[J].J Opt Soc Am,1976,66(3):207-211.

[12] 张守川.利用后向散射测量大气湍流强度的探讨[D].合肥:中科院安徽光学精密机械研究所,2004.
Zhang S C.Discussion of using the backscattering echo to measure turbulent atmosphere structure constant of refractive index.Master dissertation,Hefei:Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,2004

刘明娜, 王小强, 吴毅, 侯再红, 张守川. 湍流大气中激光聚焦光束后向散射的数值模拟[J]. 强激光与粒子束, 2005, 17(12): 1799. LIU Ming-na, WANG Xiao-qiang, WU Yi, HOU Zai-hong, ZHANG Shou-chuan. Numerical simulation of backscattering of a focused laser beam in turbulent atmosphere[J]. High Power Laser and Particle Beams, 2005, 17(12): 1799.

本文已被 2 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!