Open AccessSpatial decoherence compensation algorithm for a target speckle field in heterodyne detection based on frequency analysis and time translation
Author(s) -
Jinni Geng,
Zhouming Feng,
Changqing Cao,
Songmeng Feng,
Xiangkai Xu,
Yajie Shang,
Zengyan Wu,
Xu Yan
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.441960
Subject(s) - quantum decoherence , speckle pattern , algorithm , computer science , heterodyne (poetry) , translation (biology) , heterodyne detection , optics , compensation (psychology) , signal (programming language) , field (mathematics) , signal processing , physics , laser , telecommunications , mathematics , acoustics , psychology , biochemistry , chemistry , radar , quantum mechanics , messenger rna , psychoanalysis , pure mathematics , quantum , gene , programming language
The decoherence effect of a laser caused by a speckle field seriously restricts the development of heterodyne lidar. To address this problem, we proposed a spatial decoherence compensation algorithm, whose feasibility was proved by experiments with a system featuring simple structure and convenient operation. The results demonstrated that the speed of the proposed algorithm was several orders higher than that of other algorithms and the system SNR was increased by a maximum of 1464 times after the algorithm processing. The proposed algorithm can process the signal in real time and effectively, having great application potential in long-distance weak target detection.