Continuous Tracking and Pointing of Coherent Beam Combining System via Target-in-the-Loop Concept

被引：6
|
作者：
Yang, Xu [1 ,2 ,3 ]
Huang, Guan [4 ]
Li, Feng [3 ]
Li, Xiaoyang [1 ,2 ,3 ]
Li, Bincheng [2 ]
Geng, Chao [3 ]
Li, Xinyang [3 ]
机构：
[1] Chinese Acad Sci, Key Lab Adapt Opt, Chengdu 610209, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, Chengdu 610054, Peoples R China
[3] Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China
[4] Northwestern Polytech Univ, Sch Elect & Informat, Xian 710129, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2021年 / 33卷 / 20期
基金：
中国国家自然科学基金;
关键词：
Laser beams; Phased arrays; Pistons; Optical arrays; Optical transmitters; Lenses; Target tracking; Beam combining; beam scanning; tracking and pointing; piston control; tilt control; stochastic parallel gradient descent algorithm; ARRAY; OPTICS;
D O I：
10.1109/LPT.2021.3108419
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We demonstrate a technique to realize fine target tracking and pointing using target-in-the-loop (TIL) concept via a coherent beam combining (CBC) system. A tracking and pointing system is composed of a densely packed array of 7 phase-control elements with simultaneous piston and tilt controls of the outgoing beams wavefront phases. A photo-detector (PD) with a pinhole is used as target detection and installed on a translation stage. Energy detected by the mobile PD is used for evaluating the beam combining and scanning performance, and to provide the feedback signal for controls of piston and tilt phases of the transmitted beams by using the stochastic parallel gradient descent (SPGD) algorithm for merit function maximization.
引用
收藏
页码：1119 / 1122
页数：4
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