| Temporal Spreading Effect of Oceanic Lidar System |
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| 作者姓名： | ZHAN Enqi WANG Hongyuan |
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| 作者单位： | [1]Department of Electronic and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China [2]School of Information Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （60572015） |
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| 摘 要： | In this paper, multipath temporal spreading distributions of laser pulses are calculated when they travel through the seawater. Individual photon is followed in Monte Carlo calculation A modified Henyey-Greenstein （HG） function is applied to represent the scattering phase function of seawater. This paper proposes a new scaling method, which uses the effective scattering thickness τd to replace the optical thickness used in the traditional scaling technique. This paper compares the temporal spreading distributions of photons on conditions of different attenuation coefficients and target depths. The experiments reveal that these mutual deviations are changing in the range from 0.5% to 5%, so long as the corresponding effective scattering thicknesses τd remains the same. Therefore, a conclusion can be obtained, that the temporal spreading distribution is only dependent on the effective diffusion thickness τd .
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| 关 键 词： | 海洋激光雷达系统 空间扩展效应 散射相位 有效扩展厚度 |
| 文章编号： | 1007-1202（2007）03-0501-05 |
| 收稿时间： | 15 October 2006 |
| 修稿时间： | 2006-10-15 |
Temporal spreading effect of oceanic lidar system |
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| ZHAN Enqi WANG Hongyuan.Temporal Spreading Effect of Oceanic Lidar System[J].Wuhan University Journal of Natural Sciences,2007,12(3):501-505. |
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| Authors: | Zhan Enqi Wang Hongyuan |
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| Institution: | (1) Department of Electronic and Information Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China;(2) School of Information Engineering, Wuhan University of Technology, Wuhan, 430070, Hubei, China |
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| Abstract: | In this paper, multipath temporal spreading distributions of laser pulses are calculated when they travel through the seawater.
Individual photon is followed in Monte Carlo calculation. A modified Henyey-Greenstein (HG) function is applied to represent
the scattering phase function of seawater. This paper proposes a new scaling method, which uses the effective scattering thickness
τ
d to replace the optical thickness used in the traditional scaling technique. This paper compares the temporal spreading distributions
of photons of conditions of different attenuation coefficients and target depths. The experiments reveal that these mutual
deviations are changing in the range from 0.5% to 5%, so long as the corresponding effective scattering thicknesses τ
d remains the same. Therefore, a conclusion can be obtained, that the temporal spreading distribution is only dependent on
the effective diffusion thickness τ
d.
Biography: ZHAN Enqi(1972–), male, Ph.D. candidate, Lecturer of Wuhan University of Technology, research direction: communication and
signal processing. |
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| Keywords: | multipath temporal spreading scattering phase function effective diffusion thickness Monte Carlo calculation |
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