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International Journal of Antennas and Propagation
Volume 2015, Article ID 292905, 7 pages
http://dx.doi.org/10.1155/2015/292905
Research Article

Propagating Characteristics of Pulsed Laser in Rain

1School of IOT, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
2ZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing 210094, China

Received 28 March 2015; Revised 10 August 2015; Accepted 12 August 2015

Academic Editor: Ikmo Park

Copyright © 2015 Jing Guo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To understand the performance of laser ranging system under the rain weather condition, we need to know the propagating characteristics of laser pulse in rain. In this paper, the absorption and attenuation coefficients were calculated based on the scattering theories in discrete stochastic media, and the propagating characteristics of laser pulse in rain were simulated and analyzed using Monte-Carlo method. Some simulation results were verified by experiments, and the simulation results are well matched with the experimental data, with the maximal deviation not less than 7.5%. The results indicated that the propagating laser beam would be attenuated and distorted due to the scattering and absorption of raindrops, and the energy attenuation and pulse shape distortion strongly depended on the laser pulse widths.