沙尘在FSO常用红外波段的散射特性研究

发布时间：2018-01-11 14:02

本文关键词：沙尘在FSO常用红外波段的散射特性研究　出处：《红外与激光工程》2017年06期 　论文类型：期刊论文

【摘要】：研究红外波段沙尘的散射特性对自由空间光通信(FSO)具有重要的理论意义。针对FSO常用的几个红外波长,采用Mie理论对激光在不同沙尘粒径下的散射特性进行了分析;基于粒子尺寸的对数正态分布模型,计算了沙尘条件下红外波段(0.76~10.6μm)激光的传输衰减率。结果表明:在沙尘条件下,7.4~8.0μm这一波段附近的传输衰减最小,并且明显低于其他波段。因此,可以选用7.4~8.0μm这一波段的激光进行沙尘条件下的激光通信,其传输性能会明显优于其他波段。最后,以波长1.064μm为例,分析了"能见度"随粒子浓度的变化关系,并与蒙特卡罗方法的计算结果进行了比较。
[Abstract]:It is of great theoretical significance to study the scattering characteristics of dust dust in infrared band for free space optical communication (FSO). Several infrared wavelengths commonly used in FSO are studied. The scattering characteristics of laser under different particle sizes of sand dust were analyzed by Mie theory. Based on the logarithmic normal distribution model of particle size, the propagation attenuation rate of the infrared laser in the infrared band of 0.76 ~ 10.6 渭 m is calculated. The results show that: under the condition of sand dust. The transmission attenuation near the band of 7.4g ~ 8.0 渭 m is the least and is obviously lower than that of other bands. Therefore, the laser in the band of 7.4N ~ 8.0 渭 m can be used for laser communication under the condition of sand dust. Its transmission performance is obviously superior to that of other wavebands. Finally, taking the wavelength of 1.064 渭 m as an example, the variation of "visibility" with particle concentration is analyzed and compared with the calculated results of Monte Carlo method.
【作者单位】：西安理工大学自动化与信息工程学院;国家电网河北省电力公司检修分公司;
【基金】：国家自然科学基金青年科学基金(61405157) 陕西省自然科学基金(2015JM6270) 陕西省工业科技攻关项目(2016GY-086) 西安市产学研协同创新项目(CXY1509)
【分类号】：TN929.1
【正文快照】： 0引言大气气溶胶作为影响FSO信道的主要因素,近年来已经成为国内外研究的一个热点方向。沙尘作为一种大气气溶胶,是影响FSO质量最重要的因素之一,因此研究激光在沙尘条件下的传输和散射特性对提高FSO的质量具有重要意义。2010年Michael J.Wolff[1]等人研究了紫外光在沙尘气溶

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