Spatial degradation of pulse contrast in the focal plane for pulsed laser beams from chirped-pulse amplification system

Qingwei Yang; Mingwei Liu; Yanhai Wang; Xinglong Xie; Ailin Guo; Zunqi Lin

doi:10.1016/j.ijleo.2012.04.018

Journals >Collection Of theses on high power laser and plasma physics >Volume 10 >Issue 1 >Page 1704 > Article

Collection Of theses on high power laser and plasma physics
Vol. 10, Issue 1, 1704 (2012)

Spatial degradation of pulse contrast in the focal plane for pulsed laser beams from chirped-pulse amplification system

Qingwei Yang^1、*, Mingwei Liu², Yanhai Wang³, Xinglong Xie¹, Ailin Guo¹, and Zunqi Lin¹

Author Affiliations

¹National Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, No. 390, Qinghe Road, Jiading District, Shanghai 201800, China

²School of Physics, Hunan University of Science and Technology, Hunan 411201, China

³College of Sciences, Hebei University of Science and Technology, Shijiazhuang 050018, China

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DOI: 10.1016/j.ijleo.2012.04.018 Cite this Article

Qingwei Yang, Mingwei Liu, Yanhai Wang, Xinglong Xie, Ailin Guo, Zunqi Lin. Spatial degradation of pulse contrast in the focal plane for pulsed laser beams from chirped-pulse amplification system[J]. Collection Of theses on high power laser and plasma physics, 2012, 10(1): 1704 Copy Citation Text

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Abstract

A two-dimension model is presented to analyze the spatial dependence of pulse contrast in the focal plane. The parameters of the SHENGUANG (SG) II laser system are demonstrated as examples. Comparing with the degradation in the beam centroid, the pulse contrast degrades more seriously in the transverse. This spatial degradation of pulse contrast can be improved, such as by controlling the spatial spectrum clipping.

Keywords

Beam focusing Chirped pulse amplification Pulse contrast ratio

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