3 February 2015 Improvement of temporal contrast by 2 order of magnitude based on the deformable mirrors
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Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 925517 (2015) https://doi.org/10.1117/12.2065211
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China
Abstract
Chirp pulse amplification (CPA) has been promoted as an effective way to explore the intensity frontier. High order dispersion induced by the stretcher and materials in the CPA system, which deteriorates both the pulse duration and temporal contrast, however, can not be absolutely compensated by the compressor. Placed at the Fourier plane of a 4f zero-dispersion stretcher consisting of a grating, the deformable mirror (DM) has been demonstrated as the modulator to compensate high order dispersion. Using the method of ray tracing, the relation between spectrum and position on DM has been obtained. It shows that the resolution of the deformable mirror can be controlled by adjusting the focal length and incident angle. We have simulated a typical Ti:sappire CPA system to revise the spectral phase by the DM. The result illustrates that if the spectral phase can be compensated, the temporal contrast will be improved by 2 order of magnitude.
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Bo-peng Wang, De-en Wang, Kai-nan Zhou, Jing-qin Su, Yan-lei Zuo, Xiao-ming Zeng, Qihua Zhu, Jing Wen, Na Xie, Xiao-dong Wang, and Feng Jing "Improvement of temporal contrast by 2 order of magnitude based on the deformable mirrors", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 925517 (3 February 2015); doi: 10.1117/12.2065211; https://doi.org/10.1117/12.2065211
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