Knowledge Management System of Institute of Theoretical Physics, CAS
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 | |
发表期刊 | JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
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关键词 | Light-pulse Propagation |
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. |
2002 | |
ISSN | 1464-4258 |
卷号 | 4期号:3页码:263-270 |
学科领域 | Physics |
收录类别 | SCI |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.itp.ac.cn/handle/311006/13524 |
专题 | 理论物理所科研产出_SCI论文 |
通讯作者 | Huang, CG , Chinese Acad Sci, Inst High Energy Phys, POB 918, Beijing 100039, Peoples R China. |
推荐引用方式 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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