中国物理B ›› 2003, Vol. 12 ›› Issue (8): 879-885.doi: 10.1088/1009-1963/12/8/311

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Propagation of ultrashort pulsed beams in dispersive media

刘志军1, 吕百达2   

  1. (1)Institute of Laser Physics & Chemistry, Sichuan University, Chengdu 610064, China; (2)Institute of Laser Physics & Chemistry, Sichuan University, Chengdu 610064, China; State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2002-12-12 修回日期:2003-01-16 出版日期:2003-08-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the Foundation of State key Laboratory of Laser Technology and National Hi-Tech Project (Grant No 0102).

Propagation of ultrashort pulsed beams in dispersive media

Liu Zhi-Jun (刘志军)a, Lü Bai-Da (吕百达)ab   

  1. a Institute of Laser Physics & Chemistry, Sichuan University, Chengdu 610064, China; b State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2002-12-12 Revised:2003-01-16 Online:2003-08-16 Published:2005-03-16
  • Supported by:
    Project supported by the Foundation of State key Laboratory of Laser Technology and National Hi-Tech Project (Grant No 0102).

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摘要： Starting from the Rayleigh diffraction integral, the propagation equation of ultrashort pulsed beams in dispersive media is derived without making the paraxial approximation and slowly varying envelope approximation (SVEA). The spatiotemporal properties of ultrashort pulsed beams in dispersive media, such as spectrum redshifting, narrowing and pulse distortion are illustrated with pulsed Gaussian beams. It is stressed that the "antibeam" behaviour of ultrashort pulsed beams can be avoided, if a suitable truncation function is chosen.

Abstract: Starting from the Rayleigh diffraction integral, the propagation equation of ultrashort pulsed beams in dispersive media is derived without making the paraxial approximation and slowly varying envelope approximation (SVEA). The spatiotemporal properties of ultrashort pulsed beams in dispersive media, such as spectrum redshifting, narrowing and pulse distortion are illustrated with pulsed Gaussian beams. It is stressed that the "antibeam" behaviour of ultrashort pulsed beams can be avoided, if a suitable truncation function is chosen.

Key words: ultrashort pulsed beam, propagation, dispersive medium, antibeam behaviour

中图分类号:  (Ultrafast processes; optical pulse generation and pulse compression)

  • 42.65.Re
42.25.Bs (Wave propagation, transmission and absorption) 42.65.Sf (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics) 42.25.Fx (Diffraction and scattering) 42.65.Es (Stimulated Brillouin and Rayleigh scattering)