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Proceedings Paper

Variational approach to nonparaxial self-focusing of high-power laser beams in nonlinear media
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Paper Abstract

We apply the variational approach to solve the nonparaxial nonlinear Schrodinger equation to disclose the nonparaxial propagation properties of a Gaussian beam. A system of differential equations for the evolution of the parameters of Gaussian beam is obtained. The obtained analytical results clearly show the nonparaxial propagation process of periodic focusing-defocusing. This process is significantly influenced by the initial power and chirp of the beam. A positive chirp retards the first self-focus, while a negative chirp brings forward the first self-focus. Both positive and negative chirps increase the subsequent focusing-defocusing cycles.

Paper Details

Date Published: 26 January 2005
PDF: 6 pages
Proc. SPIE 5627, High-Power Lasers and Applications III, (26 January 2005); doi: 10.1117/12.569232
Show Author Affiliations
Jing Jin, Hunan Univ. (China)
Shuangchun Wen, Hunan Univ. (China)
Wangyang Cai, Hunan Univ. (China)
Xiquan Fu, Hunan Univ. (China)
Dianyuan Fan, Hunan Univ. (China)


Published in SPIE Proceedings Vol. 5627:
High-Power Lasers and Applications III
Dianyuan Fan; Ken-ichi Ueda; Jongmin Lee, Editor(s)

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