Negative group velocity and distortion of a pulse in an anomalous dispersion medium

	Negative group velocity and distortion of a pulse in an anomalous dispersion medium
	Huang CG(黄超光); Huang, CG; Zhang, YZ
刊名	JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
	2002
卷号	4 期号:3 页码:#REF!
关键词	negative group velocity anomalous dispersion medium
通讯作者	Huang, CG (reprint author), Chinese Acad Sci, Inst High Energy Phys, POB 918, Beijing 100039, Peoples R China.
英文摘要	Analysis of an infinitely long train of sine-squared pulses-as a toy model-propagating in a medium exhibiting anomalous dispersion shows that although the shape of the light pulses seems to be almost preserved on a small scale, the pulses are severely distorted on a large scale. The frequency of the sine-squared pulses is doubled before they propagate a tenth of the width (FWHM) of a pulse in the medium. The analysis and a numerical calculation show that the front of a wave with a step-function envelope propagates at the speed of light, c, through a medium with two gain lines. Finally, the propagation of a Gaussian pulse-a more realistic pulse-in a medium exhibiting anomalous dispersion is studied. The distortion of the pulse in a Wang-Kuzmich-Dogariu (WKD) experiment (Wang L J, Kuzmich A and Dogariu A 2000 Nature 406 277) should be observable at a precision of +/-1 ns. If a Gaussian pulse travels in the medium for 1150 of a width (FWHM), it will collapse. 'Snapshots' of a Gaussian pulse show that the shape of the pulse in space will have more than one peak at certain times. A possible picture of light propagation in WKD-like experiments is proposed on the basis on these findings.
学科主题	Optics
类目[WOS]	Optics
收录类别	SCI
WOS记录号	WOS:000176112300009
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/227275]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Huang CG,Huang, CG,Zhang, YZ. Negative group velocity and distortion of a pulse in an anomalous dispersion medium[J]. JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS,2002,4(3):#REF!.
APA	黄超光,Huang, CG,&Zhang, YZ.(2002).Negative group velocity and distortion of a pulse in an anomalous dispersion medium.JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS,4(3),#REF!.
MLA	黄超光,et al."Negative group velocity and distortion of a pulse in an anomalous dispersion medium".JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS 4.3(2002):#REF!.