Distortion of ultrashort laser pulses in a spatial filter |
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Authors: | Pingping Sun Dean Liu Yanli Zhang Yan Zhang Fang Liu Xuejie Zhang Jianqiang Zhu |
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Institution: | National Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, CAS, Shanghai 201800, PR China |
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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. |
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Keywords: | Ultrashort laser pulse Spatial filter Magnification Pulse broadening Pulse distortion |
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