Maintenance method of signal coherence in lidar and experimental validation

doi:10.1364/ol.470127

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	Maintenance method of signal coherence in lidar and experimental validation
	J. H. Gao; D. J. Li; K. Zhou; A. J. Cui; J. Wu and Y. Yao
	2022
发表期刊	Optics Letters
ISSN	0146-9592
卷号	47 期号:20 页码:5356-5359
摘要	According to the self-heterodyne signal obtained by lidar under different fiber delay times, the model of the local oscillator signal was established, and the maintenance method of signal coherence in lidar based on the digital delay was improved by using multiple sinusoidal frequency modulation components. An imaging detection experiment was carried out at a distance of 5.4 km. The coherence of the lidar signal was maintained by combining the transmitting reference channel correction method and the local oscillator reference channel compensation method, accompanied by the use of a phase spectrum to analyze the improvement effect. The processing results of the echo signal showed that the method could remove the high-order phase errors that cannot be compensated by the phase gradient autofocus algorithm and improve the signal coherence, which could be used for the detection and imaging of long-range targets. (C) 2022 Optica Publishing Group.
DOI	10.1364/ol.470127
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收录类别	sci ; ei
语种	英语
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/66827
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J. H. Gao,D. J. Li,K. Zhou,et al. Maintenance method of signal coherence in lidar and experimental validation[J]. Optics Letters,2022,47(20):5356-5359.
APA	J. H. Gao,D. J. Li,K. Zhou,A. J. Cui,&J. Wu and Y. Yao.(2022).Maintenance method of signal coherence in lidar and experimental validation.Optics Letters,47(20),5356-5359.
MLA	J. H. Gao,et al."Maintenance method of signal coherence in lidar and experimental validation".Optics Letters 47.20(2022):5356-5359.

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