Fresnel diffraction by circular and serrated apertures illuminated with an ultrashort pulsed-laser beam

被引:59
|
作者
Gu, M
Gan, XS
机构
[1] Department of Physical Optics, University of Sydney, NSW
关键词
D O I
10.1364/JOSAA.13.000771
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Fresnel diffraction patterns by circular and serrated apertures under ultrashort pulsed-laser illumination are investigated in detail. A comparison of the diffraction patterns for pulsed and continuous wave illuminations reveals that an ultrashort pulsed beam of 10 fs can result in a significant effect on the distribution of the intensity. As a result a uniform intensity distribution in the transverse direction of the beam can be achieved as a result of the interference of the different frequency components within the pulsed beam. The interference fringes caused by the wavelets originating from the diffraction aperture can be further reduced when a serrated aperture is used. (C) 1996 Optical Society of America
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页码:771 / 778
页数:8
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