摘要
液晶相控阵技术通过对光束波前进行控制,实现一定视场范围内高精度、任意角度的光束偏转。研究了基于多孔干涉原理和随机并行梯度下降算法实现光束偏转的方法,并通过对这两种方法进行数值仿真,实现对远场目标的指向,重点分析对比两者的指向精度和偏转效率。提出了一种新型的光束偏转方法,这种方法能够在整个光束偏转范围内都具有较大的指向精度和偏转效率。
Through controlling wavefront, liquid crystal optical phase array can realize precise and arbitrary angle beam steering within a certain field of view. Beam steering methods based on mutiaperture interference and stochastic parallel gradient descent algorithm are studied. By numerical simulating these two methods, beam can point to the target in far field. Pointing accuracy and steering efficiency have been compared and analyzed. A novel beam steering method is presented, which can improve beam pointing accuracy and beam steering efficiency in total range of beam steering.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2014年第2期194-198,共5页
Chinese Journal of Lasers
关键词
光通信
液晶相控阵
多孔干涉
随机并行梯度下降算法
光束偏转
optical communications
liquid crystal optical phase array
multiaperture interference
stochasticparallel gradient descent algorithm~ beam steering
