| 伪随机序列调制的激光外差探测 |
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| 引用本文： | 刘立生,赵帅,郭劲.伪随机序列调制的激光外差探测[J].红外与激光工程,2011,40(10):1890-1895. |
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| 作者姓名： | 刘立生 赵帅 郭劲 |
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| 作者单位： | 1. 激光与物质相互作用国家重点实验室,吉林长春130033;中国科学院长春光学精密机械与物理研究所,吉林长春130033;中国科学院研究生院,北京100049
2. 激光与物质相互作用国家重点实验室,吉林长春130033;中国科学院长春光学精密机械与物理研究所,吉林长春130033 |
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| 基金项目： | 中国科学院三期创新项目(O98Y32C100) |
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| 摘 要： | 在激光外差探测中,为了增强在频谱密度上对多普勒频移峰值的识别能力,提升对目标的探测概率,提出一种采用伪随机序列对连续激光进行调制的外差探测方法.应用伪随机序列的M序列码对发射激光和本振光同时进行频率调制,接收信号光和经时间延迟后的本振光相干叠加形成拍频信号.其特点是二进制码调制同时作用于发射信号光和本振光,使外差信号频...
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| 关 键 词： | 激光雷达 外差探测 伪随机序列 快速傅里叶变换 |
Pseudo-random frequency modulated laser heterodyne detection |
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| Liu Lisheng,Zhao Shuai,Guo Jin.Pseudo-random frequency modulated laser heterodyne detection[J].Infrared and Laser Engineering,2011,40(10):1890-1895. |
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| Authors: | Liu Lisheng Zhao Shuai Guo Jin |
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| Affiliation: | Liu Lisheng1,2,3,Zhao Shuai1,Guo Jin1,2(1.State Key Laboratory of Laser Interaction with Matter,Changchun 130033,China,2.Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,3.Graduate University of the Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | In order to enhance the capability to identify the peak value in the power spectrum density(PSD) of the laser heterodyne signal,and improve the detection probability,a new laser heterodyne detection method,in which pseudo-random frequency modulation was conducted on the continuous wave laser,was proposed.Pseudo-random M sequence frequency modulation was carried out to modulate both the transmitted beam and the local beam.The mixing of the received signal beam and the time-delayed local beam formed the beat ... |
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| Keywords: | laser radar heterodyne detection pseudo-random sequence fast Fourier transform |
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