Mismatch analysis of all-fiber coherent beam combiners based on the self-imaging effect  

作　　者：Yuefang Yan Yu Liu Haoyu Zhang Yuwei Li Chao Guo Qiang Shu Wenhui Huang Feng Jing Rumao Tao 

机构地区：[1]Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang,China [2]Key Laboratory of Particle&Radiation Imaging(Tsinghua University),Ministry of Education,Beijing,China

出　　处：《High Power Laser Science and Engineering》2024年第2期1-15,共15页高功率激光科学与工程（英文版）

摘　　要：All-fiber coherent beam combiners based on the self-imaging effect can achieve a near-perfect single laser beam,which can provide a promising way to overcome the power limitation of a single-fiber laser.One of the key points is combining efficiency,which is determined by various mismatches during fabrication.A theoretical model has been built,and the mismatch error is analyzed numerically for the first time.The mismatch errors have been numerically studied with the beam quality and combining efficiency being chosen as the evaluation criteria.The tolerance of each mismatch error for causing 1%loss is calculated to guide the design of the beam combiners.The simulation results are consistent with the experimental results,which show that the mismatch error of the square-core fiber is the main cause of the efficiency loss.The results can provide useful guidance for the fabrication of all-fiber coherent beam combiners.

关 键 词：ALL-FIBER coherent beam combination mismatch analysis SELF-IMAGING 

分 类 号：TN24[电子电信—物理电子学]