Fast, closed-loop iterative system-on-chip of deflection efficiency enhancement for a liquid crystal optical phased array

被引:12
作者
Huang, Yanwei [1 ]
Wang, Kangzhe [1 ]
He, Xiaoxian [1 ]
Yan, Qianying [1 ]
Wang, Yifan [1 ]
Liang, Zhiqing [1 ]
Zhuo, Rusheng [1 ]
Tan, Qinggui [2 ]
Hu, Junxiang [3 ]
Wang, Xiangru [1 ]
Gao, Shihan [3 ]
机构
[1] Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, Chengdu 610054, Peoples R China
[2] Natl Key Lab Sci & Technol Space Microwave, Xian 710100, Peoples R China
[3] Res Inst, Guangzhou Haige Commun, Guangzhou 510663, Peoples R China
基金
中国国家自然科学基金;
关键词
Closed-loop - Efficiency enhancement - Free space laser communications - Heterogeneous systems - Iterative systems - Liquid-crystals - Optical phased arrays - Optimization algorithms - System-on-chip platforms - Systems-on-Chip;
D O I
10.1364/AO.448507
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
To implement a liquid crystal optical phased array (LC-OPA) on a practical free-space laser communication terminal, there are two essential parameters: insertion loss and the dosed-loop bandwidth required to meet the dynamic linking condition of the acquisition-tracking-pointing sub-system. Real-time hardware platforms and deflection efficiency optimization algorithms have been suggested since the invention of LC-OPA. In this paper, the so-called ZYNQ platform, a field-programmable-gate-array-based heterogeneous system-on-chip (SoC), is utilized to keep real-time response and accelerate data generation, such as beam steering, beamforming, beam enhancement, etc. In addition, a novel, to the best of our knowledge, optimization algorithm is proposed on the concept of dimension reduction of the number of objective variables. After deploying on this heterogeneous SoC platform, numerical simulations and experimental results both verify that, compared to the conventional PC-based system, the integrated SoC platform offers 15.8 times faster iterative speed., a rapid convergence rate, and excellent robustness, yet with less usage of power, physical size, and monetary cost. The efficiency enhancement process costs only a few seconds at any angle, laying the foundation for practical in-line applications. (C) 2022 Optica Publishing Group
引用
收藏
页码:1583 / 1592
页数:10
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