%0 Journal Article
%T Influence and simulated correction of tip/tilt phase error on fiber laser coherent beam combination<br>倾斜相差对光纤激光相干合成的影响与模拟校正
%A Geng Chao
%A Li Xin-Yang
%A Zhang Xiao-Jun
%A Rao Chang-Hui
%A <br>耿超
%A 李新阳
%A 张小军
%A 饶长辉
%J 物理学报
%D 2011
%I 
%X Near-field models of coherent beam combination (CBC) with different beam channels and fill factors are employed, and the influences of tip/tilt phase errors on CBC are studied. The key device for tilt-error correction, named adaptive fiber optics collimator(AFOC), is introduced. A MOPA-configuration fiber laser CBC system compensating both piston and tip/tilt phase errors is designed. Then, the dynamic courses of tilt-error correction using stochastic parallel gradient descent (SPGD) algorithm in a seven-channel system are simulated, and the effects of CBC at different tilt-error amplitudes and frequencies are investigated. Experimental results show that the tilt-error should be corrected to improve CBC effects, and algorithm's control ability drops off when tilt-error amplitude and frequency increase. The results in this paper present a reference for multi-channel high power fiber laser CBC systems in real atmospheric environments.
%K fiber laser
%K coherent beam combination
%K tip/tilt phase error
%K dynamic analysis<br>光纤激光
%K 相干合成
%K 倾斜相位差
%K 动态分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=7FB288757ED284A0F3795A17B740A6E5&yid=9377ED8094509821&vid=BFE7933E5EEA150D&iid=708DD6B15D2464E8&sid=CD150561BBA8B348&eid=CD150561BBA8B348&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=12