7.1 kW coherent beam combining system based on a seven-channel fiber amplifier array

作     者：Ma, Pengfei Chang, Hongxiang Ma, Yanxing Su, Rongtao Qi, Yunfeng Wu, Jian Li, Can Long, Jinhu Lai, Wenchang Chang, Qi Hou, Tianyue Zhou, Pu Zhou, Jun 

作者机构：Natl Univ Def Technol Coll Adv Interdisciplinary Studies Changsha 410073 Peoples R China Chinese Acad Sci Shanghai Inst Opt & Fine Mech Shanghai Key Lab All Solid State Laser & Appl Tec Shanghai 201800 Peoples R China 

出 版 物：《OPTICS AND LASER TECHNOLOGY》 (光学与激光技术)

年 卷 期：2021年第140卷

页      面：107016-107016页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China [61705264, 61705265] Innovative Research Groups of Hunan Province [2019JJ10005] Training Program for Excellent Young Innovators of Changsha [KQ1905051] 

主　　题：Phase control Fiber amplifier Stochastic parallel gradient descent algorithm 

摘      要：Coherently combining of seven-channel narrow-linewidth, linear-polarized, kW-level power all-fiber amplifiers has been successfully demonstrated by using the stochastic parallel gradient descent (SPGD) algorithm. The seven polarization-maintained fiber amplifiers are tiled by a collimator array with a high lenslet filling factor (-95%). Total emitting power is -8 kW, and -7.1 kW combined output power is achieved and the contrast of the far-field intensity pattern is measured to be -86% when the system is in the closed loop. This work could provide practical reference on scaling the output power of the tiled aperture coherent beam combining system.