中国物理B ›› 2008, Vol. 17 ›› Issue (7): 2451-2457.doi: 10.1088/1674-1056/17/7/019

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Spectral anomalies of diffracted pulsed Hermite--Gaussian beams in dispersive media

潘留占1, 赵志国2, 吕百达3   

  1. (1)Department of Physics, Luoyang Normal College, Luoyang 471022, China; (2)Department of Physics, Luoyang Normal College, Luoyang 471022, China;Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China; (3)Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China
  • 收稿日期:2007-04-01 修回日期:2007-12-12 出版日期:2008-07-09 发布日期:2008-07-09
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60678055).

Spectral anomalies of diffracted pulsed Hermite--Gaussian beams in dispersive media

Zhao Zhi-Guo(赵志国)a)b)†, Pan Liu-Zhan(潘留占)a), and Lü-Bai-Da(吕百达)b)   

  1. a Department of Physics, Luoyang Normal College, Luoyang 471022, China; b Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China
  • Received:2007-04-01 Revised:2007-12-12 Online:2008-07-09 Published:2008-07-09
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60678055).

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摘要： This paper derives and uses the recurrence expressions for the power spectra of diffracted pulsed Hermite--Gaussian (HG) beams in dispersive media to study the spectral anomalies of pulsed HG beams in the far field. Numerical results are given to illustrate the dependence of spectral switches on the pulse parameters, truncation parameter and dispersive property of the medium. The potential application of spectral anomalies of ultrashort pulsed beams in information encoding and transmission is discussed.

关键词: singular optics, spectral anomaly, pulsed Hermite--Gaussian beam, dispersive medium

Abstract: This paper derives and uses the recurrence expressions for the power spectra of diffracted pulsed Hermite--Gaussian (HG) beams in dispersive media to study the spectral anomalies of pulsed HG beams in the far field. Numerical results are given to illustrate the dependence of spectral switches on the pulse parameters, truncation parameter and dispersive property of the medium. The potential application of spectral anomalies of ultrashort pulsed beams in information encoding and transmission is discussed.

Key words: singular optics, spectral anomaly, pulsed Hermite--Gaussian beam, dispersive medium

中图分类号:  (Beam characteristics: profile, intensity, and power; spatial pattern formation)

  • 42.60.Jf
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)