High-accuracy measurement and compensation of grating line-density error in a tiled-grating compressor

Dan Zhao; Xiao Wang; Jie Mu; Zhilin Li; Yanlei Zuo; Song Zhou; Kainan Zhou; Xiaoming Zeng; Jingqin Su; Qihua Zhu

doi:10.1117/12.2257544

28 February 2017 High-accuracy measurement and compensation of grating line-density error in a tiled-grating compressor

Dan Zhao, Xiao Wang, Jie Mu, Zhilin Li, Yanlei Zuo, Song Zhou, Kainan Zhou, Xiaoming Zeng, Jingqin Su, Qihua Zhu

Proceedings Volume 10256, Second International Conference on Photonics and Optical Engineering; 102562O (2017) https://doi.org/10.1117/12.2257544
Event: Second International Conference on Photonics and Optical Engineering, 2016, Xi'an, China

Abstract

The grating tiling technology is one of the most effective means to increase the aperture of the gratings. The line-density error (LDE) between sub-gratings will degrade the performance of the tiling gratings, high accuracy measurement and compensation of the LDE are of significance to improve the output pulses characteristics of the tiled-grating compressor. In this paper, the influence of LDE on the output pulses of the tiled-grating compressor is quantitatively analyzed by means of numerical simulation, the output beams drift and output pulses broadening resulting from the LDE are presented. Based on the numerical results we propose a compensation method to reduce the degradations of the tiled grating compressor by applying angular tilt error and longitudinal piston error at the same time. Moreover, a monitoring system is setup to measure the LDE between sub-gratings accurately and the dispersion variation due to the LDE is also demonstrated based on spatial-spectral interference. In this way, we can realize high-accuracy measurement and compensation of the LDE, and this would provide an efficient way to guide the adjustment of the tiling gratings.

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Dan Zhao, Xiao Wang, Jie Mu, Zhilin Li, Yanlei Zuo, Song Zhou, Kainan Zhou, Xiaoming Zeng, Jingqin Su, and Qihua Zhu "High-accuracy measurement and compensation of grating line-density error in a tiled-grating compressor", Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102562O (28 February 2017); https://doi.org/10.1117/12.2257544

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