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	Far-field analysis of ultrashort pulse through the tiled gratings
	Zuo Yan-lei ; Wei Xiao-feng ; Zhu Qi-hua ; Liu Hong-jie ; Wang Xiao ; Ying Chun-Tong
	2010-05-06 ; 2010-05-06
关键词	Theoretical or Mathematical/ aberrations diffraction gratings high-speed optical techniques integral equations laser beams/ far-field analysis ultrashort pulse grating tiling Huygens-Fresnel principle integral expression chromatic aberration phase delay far-field intensity distribution far-field beam pattern focal spot 1 ps 10 cm 200 cm/ A4260F Laser beam modulation, pulsing and switching mode locking and tuning A4280W Ultrafast optical techniques A4260H Laser beam characteristics and interactions A4215 Geometrical optics A4280F Gratings, echelles A0230 Function theory, analysis B4330B Laser beam modulation, pulsing and switching mode locking and tuning/ time 1.0E-12 s size 1.0E-01 m size 2.0E+00 m
中文摘要	From the Huygens-Fresnel principle, an integral expression with the chromatic aberration was obtained of the field amplitude of a beam with a shape of a quarter of a circle. From the integral expression amplitude expressions of the coherent addition field of four such subbeams with different phase delay were acquired and a mathematic model of the field in the far field was set up. Numerical modulation was carried out for a 1 ps ultrashort pulse with a 10 cm aperture and 200 cm focal length. The far-field intensity distributions of three cases were given including single beam, four beams without phase delay and four beams with a phase delay of phi between them. The conclusion is that the far-field pattern of a beam with a shape of a quarter of a circle is no more centrosymmetric but axis symmetric and that the focal spot is divided into two halves with a phase delay of phi between the four beams. So the phase delay between subbeams should be much smaller than phi during the course of grating tiling.
语种	中文 ; 中文
出版者	Nucl. Soc. China ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/11763]
专题	清华大学
推荐引用方式 GB/T 7714	Zuo Yan-lei,Wei Xiao-feng,Zhu Qi-hua,et al. Far-field analysis of ultrashort pulse through the tiled gratings[J],2010, 2010.
APA	Zuo Yan-lei,Wei Xiao-feng,Zhu Qi-hua,Liu Hong-jie,Wang Xiao,&Ying Chun-Tong.(2010).Far-field analysis of ultrashort pulse through the tiled gratings..
MLA	Zuo Yan-lei,et al."Far-field analysis of ultrashort pulse through the tiled gratings".(2010).

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