Fast and deterministic optical phased array calibration via pointwise optimisation  

作　　者：Jingwen Shan Hanyi Zhang Lijing Li Weijie Deng Mingjie Sun 

机构地区：[1]Department of Opto-electronic Engineering,Beihang University,Beijing 100191,China [2]Key Laboratory of Optical System Advanced Manufacturing Technology,Chinese Academy of Sciences,Changchun.*[e-mail]

出　　处：《Light(Advanced Manufacturing)》2023年第2期39-47,共9页光（先进制造）（英文）

基　　金：the National Natural Science Foundation of China under Grant Nos.61922011 and U21B2034;partly by the Open Research Projects of KLOMT under Grant No.2022KLOMT02-02.

摘　　要：Owing to the structural errors in the optical phased array,an initial random phase reduces the quality of the deflection beam.The most commonly applied approach to phase calibration is based on adaptive optics.However,adaptive optimisation approaches have slow convergence and low diffraction efficiency.We proposed a pointwise optimisation approach to achieve fast and accurate beam deflection.This approach conducts phase calibration,combining global traversal and local searches individually for each array element.We built a phase-calibration optical system containing a one-dimensional optical waveguide phase array for further verification and designed the relevant mechanics.The simulation and experimental results demonstrate that the pointwise optimisation approach accelerates the calibration process and improves the diffraction efficiency.

关 键 词：Beam deflection Optical phase array Phase calibration 

分 类 号：O17[理学—数学]