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大视场猫眼镜头激光回波功率分布模型及特性分析

Laser-Echo-Power Distribution Model of Large-Field Cat-Eye Lens and Characteristics Analysis

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摘要

猫眼效应是指猫眼光学系统能够将入射光束按照入射方向原路逆向反射回发射端的特性,反射光强度比漫反射光强度高出2~4个数量级[1]。基于猫眼效应的逆向调制激光通信系统可以将小尺寸调制器与大口径光学系统匹配,使自由空间光通信系统在保证大视场、小后向发散角、高回波功率的同时有效提高通信速率[2-6]。

Abstract

Considering the cat-eye effect based retro-modulating laser communication as the application background, a large-field cat-eye echo power distribution model is established based on the Collins diffraction formula by transforming the angular misalignment of the cat-eye lens into a line offset. The effects of the defocusing amount, incident angle, cat-eye diameter, and focal length on the echo power distribution and original return characteristics of the cat-eye echo beam are analyzed and verified with experiments. The results show that the larger the incident angle is,the smaller the echo spot area is,and the stronger the diffraction is. At the same incident angle, the larger the aperture of the cat-eye is, the smaller the focal length is, and the smaller the echo spot affected by the incident angle is. The divergence angle of the positive defocus echo spot at the same defocusing amount is smaller than that of the negative defocus. The center shift of the cat-eye echo varies linearly with both the incident angle and the defocusing amount, and there is a positive defocusing amount that causes the echo beam to return to the original path.

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DOI:10.3788/AOS201939.1006001

所属栏目:光纤光学与光通信

收稿日期:2019-04-09

修改稿日期:2019-05-31

网络出版日期:2019-10-01

作者单位    点击查看

段帅军:航天工程大学研究生院, 北京 101416
樊桂花:航天工程大学电子与光学工程系, 北京 101416
张来线:航天工程大学电子与光学工程系, 北京 101416
刘瑞丰:航天工程大学研究生院, 北京 101416

联系人作者:樊桂花(fanguihua@sina.com)

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引用该论文

Shuaijun Duan,Guihua Fan,Laixian Zhang,Ruifeng Liu. Laser-Echo-Power Distribution Model of Large-Field Cat-Eye Lens and Characteristics Analysis[J]. Acta Optica Sinica, 2019, 39(10): 1006001

段帅军,樊桂花,张来线,刘瑞丰. 大视场猫眼镜头激光回波功率分布模型及特性分析[J]. 光学学报, 2019, 39(10): 1006001

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