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Negative group velocity and distortion of a pulse in an anomalous dispersion medium
Huang, CG; Zhang, YZ; Huang, CG , Chinese Acad Sci, Inst High Energy Phys, POB 918, Beijing 100039, Peoples R China.
2002
发表期刊JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
ISSN1464-4258
卷号4期号:3页码:263-270
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.
部门归属Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China; CCAST, World Lab, Beijing 100080, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Light-pulse Propagation
学科领域Physics
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收录类别SCI
WOS记录号WOS:000176112300009
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被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13524
专题理论物理所1978-2010年知识产出
通讯作者Huang, CG , Chinese Acad Sci, Inst High Energy Phys, POB 918, Beijing 100039, Peoples R China.
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Huang, CG,Zhang, YZ,Huang, CG , Chinese Acad Sci, Inst High Energy Phys, POB 918, Beijing 100039, Peoples R China.. 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):263-270.
APA Huang, CG,Zhang, YZ,&Huang, CG , Chinese Acad Sci, Inst High Energy Phys, POB 918, Beijing 100039, Peoples R China..(2002).Negative group velocity and distortion of a pulse in an anomalous dispersion medium.JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS,4(3),263-270.
MLA Huang, CG,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):263-270.
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