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Abstract

Active illumination is a crucial technology for active imaging, active tracking and aiming system. But the atmosphere turbulence distributed over the entire path causes the intensity to fluctuate, which reduces the illumination uniformity seriously. Therefore, it is desirable to find ways to reduce the intensity fluctuation and improve the uniformity of active illumination. It has been revealed that one can improve illumination uniformity by using multi-beam laser illuminator. Another effective approach is partially coherent beam illumination. In this paper, a novel method is suggested to improve the illumination uniformity. Phase disturbance is induced by a ladder-like phase modulator (LPM) and the transmitting field of narrow spectrum laser is confused, and thus the atmosphere turbulence will be compensated and the illumination uniformity will be improved. The physical models of narrow spectrum laser phase modulation and atmosphere propagation are deduced, and the expression of the facular distribution is obtained. The active-illumination experimental setup with a laser propagation distance of 1.8 km through horizontal atmosphere is established. Based on the facular distribution of illumination laser at 1.8 km, the uniformity and stabilization are achieved. The experimental results indicate that the illumination uniformity and stabilization are both improved. The spatial and central time scintillation indexes are improved from 0.73 to 0.33 and from 0.38 to 0.14, respectively.

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Corresponding author:Zhang Jian-Zhu,zhang_jianzhu@iapcm.ac.cn

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[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]

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光学镜序号	中心位置		厚度
光学镜序号	X/mm	Y/mm	h/mm
1	0	37.8	0
2	35.9	11.7	50.3
3	22.2	–30.6	100.6
4	–22.2	–30.6	150.9
5	–35.9	11.7	201.3

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[1]	Wei Jia-Xin, Sha Peng-Fei, Fang Xu-Chen, Lu Zeng-Xiong, Li Hui, Tan Fang-Rui, Wu Xiao-Bin.Illumination homogenization of highly coherent light source based on phase modulation. Acta Physica Sinica, 2024, 73(15): 154101.doi:10.7498/aps.73.20240644
[2]	Abdikirim Azizigul, Tao Zhi-Wei, Liu Shi-Wei, Li Yan-Ling, Rao Rui-Zhong, Ren Yi-Chong.Influence of atmospheric turbulence on temporal coherence characteristics of received optical field. Acta Physica Sinica, 2022, 71(23): 234201.doi:10.7498/aps.71.20221202
[3]	Luo Wen, Zhang Fei-Zhou, Zhang Jian-Zhu.Influence factors and laws of laser active illumination uniformity. Acta Physica Sinica, 2022, 71(15): 154203.doi:10.7498/aps.71.20220420
[4]	Xu Qi-Wei, Wang Pei-Pei, Zeng Zhen-Jia, Huang Ze-Bin, Zhou Xin-Xing, Liu Jun-Min, Li Ying, Chen Shu-Qing, Fan Dian-Yuan.Extracting atmospheric turbulence phase using deep convolutional neural network. Acta Physica Sinica, 2020, 69(1): 014209.doi:10.7498/aps.69.20190982
[5]	Dai Shu-Tao, Jiang Tao, Wu Li-Xia, Wu Hong-Chun, Lin Wen-Xiong.Single-axial-mode Nd:YAG laser with precisely controllable laser pulse output time. Acta Physica Sinica, 2019, 68(13): 134202.doi:10.7498/aps.68.20190393
[6]	Zhang Dong-Xiao, Chen Zhi-Bin, Xiao Cheng, Qin Meng-Ze, Wu Hao.Generation of turbulence phase screen based on gravitational search algorithm. Acta Physica Sinica, 2019, 68(13): 134205.doi:10.7498/aps.68.20190081
[7]	Du Jun, Yang Na, Li Jun-Ling, Qu Yan-Chen, Li Shi-Ming, Ding Yun-Hong, Li Rui.Improvement of phase modulation laser Doppler shift measurement method. Acta Physica Sinica, 2018, 67(6): 064204.doi:10.7498/aps.67.20172049
[8]	Cheng Zhi, Tan Feng-Fu, Jing Xu, He Feng, Hou Zai-Hong.Theoretical and experimental study of atmospheric turbulence measurement using two-aperture differential scintillation method. Acta Physica Sinica, 2016, 65(7): 074205.doi:10.7498/aps.65.074205
[9]	Cai Dong-Mei, Ti Pei-Pei, Jia Peng, Wang Dong, Liu Jian-Xia.Fast simulation of atmospheric turbulence phase screen based on non-uniform sampling. Acta Physica Sinica, 2015, 64(22): 224217.doi:10.7498/aps.64.224217
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[12]	Li Xiao-Qing, Ji Xiao-Ling, Zhu Jian-Hua.Higher-order intensity moments of optical beams in atmospheric turbulence. Acta Physica Sinica, 2013, 62(4): 044217.doi:10.7498/aps.62.044217
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Vol. 70, Issue 15 - 2021-08-05

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