Coherent addition of gratings for chirped-pulse-amplified lasers based on near-field and far-field measurements  

作　　者：杨雨川 罗晖 王逍 李富全 黄小军 冯斌 景峰 

机构地区：[1]College of Optic-Electric Science and Engineering,National University of Defense Technology [2]Research Center of Laser Fusion,China Academy of Engineering Physics

出　　处：《Chinese Optics Letters》2011年第4期67-70,共4页中国光学快报（英文版）

基　　金：supported by the National "863" Program of China (No. 2009AA8044005);the Laboratory of Laser Fusion and Research Center of Laser Fusion under the Innovatory Fund (No. 20090604)

摘　　要：The development of phased-array grating compressor is a crucial issue for high-energy, ultra-short pulse petawatt-class lasers. Almost all systems have adopted a tiled-grating approach to meet the size requirements for the compression gratings. We present a computer-control test system utilizing near-field interference and far-field focusing capable of monitoring and fast correcting tiled errors of the grating compressor. In this system, the tilt/tip errors between the two gratings are determined by the Fourier transform （FT） of the individual interference fringe, and the piston errors are determined by the ratio of the two primary peaks formed in the far-field pattern as a function of the piston difference. Monochromatic grating phasing is achieved experimentally and pulse compression is demonstrated with a tiled grating system.The development of phased-array grating compressor is a crucial issue for high-energy, ultra-short pulse petawatt-class lasers. Almost all systems have adopted a tiled-grating approach to meet the size requirements for the compression gratings. We present a computer-control test system utilizing near-field interference and far-field focusing capable of monitoring and fast correcting tiled errors of the grating compressor. In this system, the tilt/tip errors between the two gratings are determined by the Fourier transform （FT） of the individual interference fringe, and the piston errors are determined by the ratio of the two primary peaks formed in the far-field pattern as a function of the piston difference. Monochromatic grating phasing is achieved experimentally and pulse compression is demonstrated with a tiled grating system.

关 键 词：Compressors Computer control systems ERRORS Fourier transforms 

分 类 号：TN248[电子电信—物理电子学]