The Improved Power of the Central Lobe in the Beam Combination and High Power Output  

作　　者：LIU Hou-Kang XUE Yu-Hao LI Zhen HE Bing ZHOU Jun DING Ya-Qian JIAO Meng-Li LIU Chi QI Yun-Feng WEI Yun-Rong DONG Jing-Xing LOU Qi-Hong 刘厚康;薛宇豪;李震;何兵;周军;丁亚茜;焦梦丽;刘驰;漆云凤;魏运荣;董景星;楼祺洪(Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800;Graduate University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800 [2]Graduate University of Chinese Academy of Sciences,Beijing 100049

出　　处：《Chinese Physics Letters》2012年第4期82-85,共4页中国物理快报（英文版）

基　　金：Supported by the National Science and Technology Major Project(No 2010ZX04013);the National High Technology Research and Development Program of China under Grant No 2011AA030201,the Shanghai Rising-Star Program(No 09QB1401700);the Natural Science Foundation(No 60908011)。

摘　　要：In order to increase the power fraction of the central lobe in the coherent beam combination of lasers in an array,the effects of the distance factor of near-field distribution on far-field interference patterns are calculated and demonstrated experimentally.An improved beam array of interwoven distribution is demonstrated to enable the power in the central lobe to reach 41%.An optimized mirror array is carefully designed to obtain a high duty ratio,which is up to 53.3% at a high power level.By using these optimized methods and designs,the passive phase locking of eight Yb-doped fiber amplifiers with ring cavities are obtained,and a pleasing interference pattern with 87% visibility is observed.The maximum coherent output power of the system is up to 1066 W.

关 键 词：PASSIVE fiber COHERENT 

分 类 号：TN2[电子电信—物理电子学]