中国物理B ›› 2005, Vol. 14 ›› Issue (10): 2019-2025.doi: 10.1088/1009-1963/14/10/017

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

The propagation dynamics of ultraviolet light filament with Rayleigh scattering in air

张华   

  1. Nantong University, School of Science, Nantong 226007,China
  • 收稿日期:2004-07-21 修回日期:2005-05-30 出版日期:2005-10-20 发布日期:2005-10-20

The propagation dynamics of ultraviolet light filament with Rayleigh scattering in air

Zhang Hua (张华)   

  1. Nantong University, School of Science, Nantong 226007,China
  • Received:2004-07-21 Revised:2005-05-30 Online:2005-10-20 Published:2005-10-20

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摘要： In this paper we present for the first time the effects of Rayleigh scattering on the long distance propagation of ultraviolet (UV) light filament in air based on the stationary analysis. The simulation results show that the effects of Rayleigh scattering on the propagation of UV laser filaments may not be ignored. These influences are slightly dependent on the laser wavelength. We also compare the UV filament propagations at different input powers in the presence and the absence of the Rayleigh scattering and discuss the mechanisms of power loss and beam defocusing. In the absence of Rayleigh scattering, the filament propagation is determined by the oscillating behaviour of the beam size. In the presence of the scattering,the propagation lengths of filament are close to each other at different initial powers and determined by the Rayleigh scattering.

Abstract: In this paper we present for the first time the effects of Rayleigh scattering on the long distance propagation of ultraviolet (UV) light filament in air based on the stationary analysis. The simulation results show that the effects of Rayleigh scattering on the propagation of UV laser filaments may not be ignored. These influences are slightly dependent on the laser wavelength. We also compare the UV filament propagations at different input powers in the presence and the absence of the Rayleigh scattering and discuss the mechanisms of power loss and beam defocusing. In the absence of Rayleigh scattering, the filament propagation is determined by the oscillating behaviour of the beam size. In the presence of the scattering,the propagation lengths of filament are close to each other at different initial powers and determined by the Rayleigh scattering.

Key words: filament, self-focusing, Rayleigh scattering

中图分类号:  (Stimulated Brillouin and Rayleigh scattering)

  • 42.65.Es
42.65.Jx (Beam trapping, self-focusing and defocusing; self-phase modulation) 42.25.Bs (Wave propagation, transmission and absorption)