Analysis of characteristics of light propagation through clouds and Monte Carlo simulation
-
摘要: 为了研究激光在云层中传输的多次散射特性,分析了传输过程中的功率损耗,并采用蒙特卡罗法模拟传输过程,得出时间展宽后的脉冲波形。结果表明,时间展宽后的脉冲具有陡峭的上升沿和指数形式的收尾;非对称因子、云层物理厚度、消光系数、接收视场角等对时间展宽都有影响,其中,非对称因子、云层物理厚度对时间展宽及时间延迟影响较大。Abstract: In order to study the multiple scattering characteristics of light propagation through clouds,received power was analyzed,the laser transferring process in clouds was simulated with Monte Carlo method,and the waveform broadened temporal signal was obtained.Results illustrate the broadened signal has a steep rise edge followed by an exponential tail,and that the broadened shape is affected by some parameters such as asymmetry factor,clouds thickness,extinction coefficients,receiver field of view,especially strongly by asymmetry factor and clouds thickness.
-
-
[1] SUN X M,HAN Y P.Absorption and scattering of light by ice-water mixed clouds[J].Acta Physica Sinica,2006,55(2):682-687(in Chinese).
[2] SALONEN E.New prediction method of cloud attenuation[J].Electron Lett,1991,27(12):1106-1108.
[3] YONG J F,STEVEN L J.Monte Carlo simulation study on phase function[J].Proc SPIE,2006,6084:81-87.
[4] ADRIAN C S.Attenuation and impulse response for multiple scattering of light in atmospheric clouds and aerosols[J].Appl Opt,2006,45(13):2842-2844.
[5] XIA M,YANG K Ch,XU D Sh,et al.Monte Carlo simulation of depolarization during laser transferring in the water[J].Laser Technology,2005,29(1):24-27(in Chinese).
[6] DU Zh F,LU Y M,YANG Zh K,et al.Monte Carlo calculations of the received oceanic lidar signals[J].Chinese Journal of Lasers,1999,26(1):52-56(in Chinese).
[7] YAN X G,PENG F Y,XU G H,et al.Analysis of temporal and frequency characteristics of fore-scattered laser in ocean channel[J].Laser Technology,2005,29(3):267-269(in Chinese).
[8] ARINDAM B,ANIL A O,KUNAL M.Experimental simulation oflightning optical emissions in clouds[J].J Phys,2006,D39(3):575-583.
[9] TAN X Q,CHEN R.A study for pulse width stabilization technique used in underwater laser pulse position modulation communication[J].Opto-electronic Engineering,2002,29(1):23-25(in Chinese).
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 8