Dynamic beam shaping with a compact coherently combined fiber laser array  

作　　者：Rongtao Su Jinhu Long Kaikai Jin Hongxiang Chang Yanxing Ma Pu Zhou 粟荣涛;龙金虎;靳凯凯;常洪祥;马阎星;周朴(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China;Nanhu Laser Laboratory,National University of Defense Technology,Changsha 410073,China;Hunan Provincial Key Laboratory of High Energy Laser Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China [2]Nanhu Laser Laboratory,National University of Defense Technology,Changsha 410073,China [3]Hunan Provincial Key Laboratory of High Energy Laser Technology,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Optics Letters》2024年第11期86-92,共7页中国光学快报(英文版)

基　　金：supported by the National Natural Science Foundation of China (No.62275272);the Training Program for Excellent Young Innovators of Changsha(No.kq2205025)。

摘　　要：Dynamic beam shaping is of importance for a wide range of applications, such as light field regulation, laser processing, and advanced manufacturing. In this paper, an internal phase-sensing tiled-aperture coherent beam-combining system with seven beam elements was constructed for dynamic beam shaping. This system could be performed as a digital laser,where each laser beamlet functioned as an individual laser pixel. The amplitude and phase of each laser pixel could be adjusted independently in real time. In our experiment, the laser array was operated in three different configurations:the triangular, pentagonal, and hexagonal laser arrays, while each laser pixel was modulated with a different piston phase of nπ(where n was an integer). We demonstrated various beam-shaping patterns based on this system with output powers scaling over 1 kW. Additionally, the energy distribution of the emitted laser could be flexibly varied and customized.These results highlighted that our dynamic beam-shaped laser exhibited excellent performance in both dynamic beam-shaping and power-scaling capabilities. This work holds great potential for numerous applications involving beam shaping.

关 键 词：structured light fields laser array coherent beam combining fiber laser. 

分 类 号：TN2[电子电信—物理电子学]