Geng Jinni, Feng Zhejun, Cao Changqing, Feng Songmeng, Xu Xiangkai, Shang Yajie, Wu Zengyan, Yan Xu
Opt Express. 2021 Nov 22;29(24):39016-39026. doi: 10.1364/OE.441960.
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.
散斑场引起的激光退相干效应严重制约了外差激光雷达的发展。为解决这一问题，我们提出了一种空间退相干补偿算法，通过结构简单、操作方便的系统实验证明了其可行性。结果表明，该算法的速度比其他算法高几个数量级，算法处理后系统信噪比最大提高了1464倍。该算法能够实时、有效地处理信号，在远距离弱目标探测中具有很大的应用潜力。
