Collection Of theses on high power laser and plasma physics, 2007, 5 (1): 110, Published Online: Sep. 18, 2008  

Chirped Pulse Spectrum Shaping by Spatial Grating with Variable Line-Space

Author Affiliations
中国科学院上海光学精密机械研究所 高功率激光物理联合实验室, 上海 201800
Abstract
In order to take full advantage of amplifier gain-bandwidth, and obtain a shorter pulse with higher power in the terminal, it is necessary to conduct a spectrum shaping before the seed pulse being injected into the main amplifier chain to compensate the effect of gain narrowing. A new method, based on the spatial grating with variable line-space for spectrum shaping of chirped laser pulse with the central wavelength at 1053 nm and line width 6 nm, is presented. The rigorous coupled-wave theory is used to analyze the characteristics of grating diffraction, and the results indicate that this method produces no phase distortion. The diffraction efficiency, as a function of the depth and period of groove, incidenct angle, and incident wavelength, is calculated and analyzed, respectively. With proper grating parameters, the spectrum modulation depth from 0.5% to 84% can be achieved.

Ailin Guo, Qingwei Yang, Xinglong Xie, Qi Gao, Zhiling Xue, Meirong Li. Chirped Pulse Spectrum Shaping by Spatial Grating with Variable Line-Space[J]. Collection Of theses on high power laser and plasma physics, 2007, 5(1): 110.

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