关键词: 拼接光栅/
光栅刻线密度差/
光栅对压缩器/
啁啾脉冲放大
English Abstract
Effect of grating groove density error on the output pulses of the tiled grating compressor and corresponding compensation scheme
Zhao Dan1,2,3,Wang Xiao1,3,
Mu Jie1,3,
Zuo Yan-Lei1,
Zhou Song1,
Zhou Kai-Nan1,3,
Zeng Xiao-Ming1,
Li Zhi-Lin1,3,
Su Jing-Qin1,
Zhu Qi-Hua1,3
1.Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;
2.Graduate School of China Academy of Engineering Physics, Beijing 100088, China;
3.Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant Nos. 61308040, 61505188) and the National High Technology Research and Development Program of China (Grant No. 2015AA8043047).Received Date:26 August 2016
Accepted Date:25 October 2016
Published Online:20 January 2017
Abstract:The grating groove density error (GGDE) will degrade the performance of the tiled-grating compressor, and the compensation for GGDE is of significance for improving the characteristics of the output pulses. With the ray-tracing method, analytical expressions considering GGDE are derived to predict the output beam drift and the output pulse broadening. According to the numerical results, we propose a compensation method to reduce the degradation of the tiled-grating compressor by applying angular tilt error and longitudinal piston error simultaneously. The tilt angle and the translation distance of the grating, as well as the allowable tolerance range of GGDE are obtained with this compensation method. By using the equiphase lines in the spatial-spectral interference patterns, the experimental results demonstrate that this compensation method can correct the angular drift of the output beams effectively, and compensate for the second-order and the third-order dispersion error well. Our investigation provides an efficient way to guide the adjustment of the tiled grating with GGDE.
Keywords: tiled grating/
grating groove density error/
grating-pair compressor/
chirped pulse amplification
