Chinese Optics Letters, 2020, 18 (4): 041402, Published Online: Apr. 14, 2020
Coherent beam combination far-field measuring method based on amplitude modulation and deep learning Download: 702次
Abstract
A deep convolutional neural network is employed to simultaneously measure the beam-pointing and phase difference of sub-beams from a single far-field interference fringe for coherent beam combining systems. The amplitudes of sub-beams in the measurement path are modulated in order to prevent measuring mistakes caused by the symmetry of beam-pointing. This method is able to measure beam-pointing and phase difference with an RMS accuracy of about 0.2 μrad and λ/250, respectively, in a two-beam coherent beam combining system.
Renqi Liu, Chun Peng, Xiaoyan Liang, Ruxin Li. Coherent beam combination far-field measuring method based on amplitude modulation and deep learning[J]. Chinese Optics Letters, 2020, 18(4): 041402.