Distortion of ultrashort laser pulses in a spatial filter

• DOI: 10.1016/j.ijleo.2011.02.015
• Publication Date: 2011-05-26T04:57:18Z
• Authors: Pingping Sun; Dean Liu; Yanli Zhang; Yan Zhang; Fang Liu; Xuejie Zhang; Jianqiang Zhu
• Keywords: Distortion (music); Prism compressor; Ultrashort pulse laser; Aperture (computer memory)

Abstract By means of Collins diffraction integral, the propagation expression of an ultrashort laser pulse passing through a spatial filter is derived. The effects of the magnification of spatial filter on pulse broadening and distortion of pulse-front for the ultrashort optical pulse are analytically deduced and numerically simulated. It is found that pulse broadening and propagation time difference of a laser pulse getting through spatial filter is proportional to the magnification. As a conclusion, in an ultrashort pulse laser system with a large aperture, the effect of pulse broadening and distortion of pulse-front should be considered.