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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
Source PublicationJOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
KeywordLight-pulse Propagation
AbstractAnalysis 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.
2002
ISSN1464-4258
Volume4Issue:3Pages:263-270
Subject AreaPhysics
Indexed BySCI
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13524
Collection理论物理所科研产出_SCI论文
Corresponding AuthorHuang, CG , Chinese Acad Sci, Inst High Energy Phys, POB 918, Beijing 100039, Peoples R China.
Recommended Citation
GB/T 7714
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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