| 高散射抑制比激光雷达水下探测技术探析 |
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| 引用本文： | 沈振民,尚卫东,王冰洁,赵彤,张海洋,郑永超,周国清.高散射抑制比激光雷达水下探测技术探析[J].光子学报,2020,49(6):86-93. |
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| 作者姓名： | 沈振民 尚卫东 王冰洁 赵彤 张海洋 郑永超 周国清 |
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| 作者单位： | 北京空间机电研究所,北京 100094;中国空间技术研究院 空间激光信息感知技术核心专业实验室,北京 100094,北京空间机电研究所,北京 100094;中国空间技术研究院 空间激光信息感知技术核心专业实验室,北京 100094,太原理工大学 光电工程研究所,太原 030024,太原理工大学 光电工程研究所,太原 030024,北京理工大学 光电学院,北京 100081,北京空间机电研究所,北京 100094;中国空间技术研究院 空间激光信息感知技术核心专业实验室,北京 100094,桂林理工大学 广西空间信息与测绘重点实验室,广西 桂林 541004 |
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| 基金项目： | 广西创新驱动发展专项;国家自然科学基金 |
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| 摘 要： | 浅海海水严重的后向散射是阻碍激光近海水下探测应用的关键问题,回波信号中的后向散射制约了水下目标探测深度、分辨率和对比度.针对该问题,研究了两种高散射抑制比海洋激光雷达——混沌脉冲激光雷达和相干双频脉冲激光雷达,这两种激光雷达信号具有内在的高频强度调制特性,而后向散射具有低频特性.因此,在目标信号光和后向散射光同量级条件下,可通过带通或高通滤波将海水后向散射滤除,从而提高系统信噪比.
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| 关 键 词： | 激光雷达 水下探测 强度调制 混沌激光 后向散射 |
Lidar with High Scattering Ratio Suppression for Underwater Detection |
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| SHEN Zhen-min,SHANG Wei-dong,WANG Bing-jie,ZHAO Tong,ZHANG Hai-yang,ZHENG Yong-chao,ZHOU Guo-qing.Lidar with High Scattering Ratio Suppression for Underwater Detection[J].Acta Photonica Sinica,2020,49(6):86-93. |
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| Authors: | SHEN Zhen-min SHANG Wei-dong WANG Bing-jie ZHAO Tong ZHANG Hai-yang ZHENG Yong-chao ZHOU Guo-qing |
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| Institution: | (Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China;Key Laboratory for Space Laser Inforrnation Perception Technology,China Academy of Space Technology,Beijing 10094,China;Institute of Optoelectronic Engineering,Taiyuan University of Technology,Taiyuan 030024,China;School of Optoelectronics,Beijing Institute of Technology,Beijing 100081,China;Guangxi Key Laboratory of Spatial Information and Geomatics,Guilin University of Technology,Guilin,Guangxi 541004,China) |
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| Abstract: | The severe backscattering of the shallow seawater hinders the application of laser detection in the offshore.The backscattering of the echo signal restricts the depth,resolution and contrast of underwater target detection.Two novel ocean lidar with high scattering suppression radio,chaotic lidar and coherent dual frequency lidar,are studied.The two kinds of lidar signal owns the inherent intensity modulation characteristics,and then the backscattering owns the low frequency characteristics.Therefore,the backscattering of seawater can be removed by the band-pass or high pass filtering when the intensity of the object signal and the backscattering light are the approximate same magnitude,so as to improve the signal-to-noise ratio of the ocean lidar system. |
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| Keywords: | Laser radar Underwater detection Intensity modulation Chaotic laser Backscattering |
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