雨滴对波长0.532μm激光光束的衰减特性

兵工学报 ›› 2011, Vol. 32 ›› Issue (7): 878-883.

雨滴对波长0.532μm激光光束的衰减特性

郭婧，张合，王晓锋

（南京理工大学智能弹药技术国防重点学科实验室, 江苏南京 210094）

收稿日期:2010-05-18 修回日期:2010-05-18 上线日期:2014-05-04
通讯作者: 郭婧 E-mail:sandyguo0826@163.com
作者简介:郭婧(1984—)女博士研究生
基金资助:
国家部委基金项目（9140A05010610BQ02）

Attenuation of 0.532μm Laser Beam Through Raindrops

GUO Jing, ZHANG He, WANG Xiao-feng

(ZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)

Received:2010-05-18 Revised:2010-05-18 Online:2014-05-04
Contact: GUO Jing E-mail:sandyguo0826@163.com

摘要/Abstract

摘要： 降雨对激光信号产生严重的衰减，从而给激光近炸引信的应用带来一定的影响。激光在雨中的传输衰减已在红外波段有了深入研究，而可见光波段激光在雨中传输的衰减特性还未见报道。在夫琅禾费衍射和几何光学散射理论基础上，建立单雨滴对波长0.532 μm绿激光光束的传输衰减模型，通过实验测试多雨滴的透过率并与理论计算结果进行对比，误差不超过2%. 研究分析表明：雨滴对波长0.532 μm激光的吸收率为1.32×10^－9，可忽略；在传播过程中，只考虑雨滴的散射衰减，并且受衍射与几何散射共同影响；而近红外激光由于雨滴的吸收作用使得透过率低于0.532 μm. 雨滴的衰减特性研究为绿激光在降雨环境下引信中的应用提供了一定的理论依据。降雨对激光信号产生严重的衰减，从而给激光近炸引信的应用带来一定的影响。激光在雨中的传输衰减已在红外波段有了深入研究，而可见光波段激光在雨中传输的衰减特性还未见报道。在夫琅禾费衍射和几何光学散射理论基础上，建立单雨滴对波长0.532 μm绿激光光束的传输衰减模型，通过实验测试多雨滴的透过率并与理论计算结果进行对比，误差不超过2%. 研究分析表明：雨滴对波长0.532 μm激光的吸收率为1.32×10^－9，可忽略；在传播过程中，只考虑雨滴的散射衰减，并且受衍射与几何散射共同影响；而近红外激光由于雨滴的吸收作用使得透过率低于0.532 μm. 雨滴的衰减特性研究为绿激光在降雨环境下引信中的应用提供了一定的理论依据。

关键词: 光电子学与激光技术, 激光近炸引信, 雨滴散射, 衰减模型, 波长0.532 μm激光

Abstract: Rainfall can bring serious attenuation to the laser signals, so it has some influence on the laser proximity fuze applied in the rain. The attenuation of laser beam propagating in the rain has been researched in the infrared range, but the attenuation of visible light laser in the rain has not been reported. Therefore, based on the Fraunhofer diffraction and geometric optics theory, an attenuation model for 0.532 μm laser beam propagating through the raindrops was established. Then the transmittance of several raindrops was theoretically calculated and validated by experiments, and the error was less than 2%. The investigations indicate that absorptivity of the raindrop for 0.532 μm laser beam is 1.32×10^－9 and can be ignored, so only the raindrop scattering is considered in the laser transmission and influenced by the diffraction and geometric scattering synchronously. The transmittance of near infrared laser is lower than that of 0.532 μm laser due to the raindrop absorption. The attenuation model of 0.532 μm laser provides a theoretical basis for the green laser applied in the proximity fuze operating in the rain.

Key words: optoelectronics and laser, laser proximity fuze, raindrop scattering, attenuation model, 0.532 μm laser

中图分类号:

TJ430

郭婧，张合，王晓锋. 雨滴对波长0.532μm激光光束的衰减特性[J]. 兵工学报, 2011, 32(7): 878-883.

GUO Jing, ZHANG He, WANG Xiao-feng. Attenuation of 0.532μm Laser Beam Through Raindrops[J]. Acta Armamentarii, 2011, 32(7): 878-883.

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