Spatial-Temporal-Property Analysis of Ultrashort Pulse Propagating Through Real Optical System

Qiangsheng, 刘强生 Liu; Zhaofeng, 岑兆丰 Cen; Xiaotong, 李晓彤 Li; Hongbo, 尚红波 Shang; Wei, 胡炜 Hu

doi:10.3788/aos201333.0132001

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The influence on spatial output characteristics by wave front deviation has been analyzed by mature means 11 . However the discussed temporal characteristic by wave front deviation is confined to the pulse width 12 , without considering the temporal contrast degradation by wave front deviation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of temporal contrast degradation due to wave front deviation in large aperture ultra-short pulse focusing system

et al. 2014

View full text Add to dashboard Cite

In extremely intense laser system used for plasma physics experiments, temporal contrast is an important property of the ultra-short pulse. In this paper, we theoretically study the temporal contrast degradation due to wave front deviation in large aperture ultra-short pulse focusing system. Two-step focusing fast Fourier transform (FFT) algorithm with the coordinate transform based on Fresnel approximation in space domain and Fourier integral transform method in time domain were used to simulate the focusing process spatially and temporally, in which the spatial distribution of ultrashort pulse temporal contrast characteristics at the focal spot is related to the wave front in large aperture off-axis parabolic mirror focusing optical system. Firstly, temporal contrast degradation due to wave front noise with higher spatial frequency is analyzed and appropriate evaluation parameter for large aperture ultra-short pulse focusing system is put forward from the perspective of temporal contrast. Secondly, the influence of wave front distortion with lower spatial frequency on temporal contrast is revealed comparing different degradation characteristics of various aberrations. At last, a method by controlling and optimizing the wave front to prevent temporal contrast degradation in large aperture ultrashort laser system is proposed, which is of great significance for high temporal contrast petawatt laser facilities.

show abstract

Section: Introductionmentioning

confidence: 99%