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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 8, Iss. 2 — Feb. 1, 2010
  • pp: 210–212

Small-scale self-focusing of divergent beam in nonlinear media with loss

Yanli Zhang, Xiaoyan Li, Yan Zhang, Pingping Sun, and Jianqiang Zhu  »View Author Affiliations


Chinese Optics Letters, Vol. 8, Issue 2, pp. 210-212 (2010)


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Abstract

Bespalov-Talanov theory on small-scale self-focusing is extended to include medium loss for a divergent beam. Gain spectrum of small-scale perturbation is presented in integral form, and based on the derived equations we find that the cutoff spatial frequency for perturbation keeps a constant value. The larger the medium loss is, the smaller the fastest growing frequency and the maximum gain of perturbation with defined propagation distance are. For a given medium loss the maximum gain of perturbation becomes larger, while the fastest growing frequency becomes smaller as the propagation distance becomes longer. Furthermore, physical explanations for the appearance of these features are given.

© 2010 Chinese Optics Letters

OCIS Codes
(140.3440) Lasers and laser optics : Laser-induced breakdown
(190.3100) Nonlinear optics : Instabilities and chaos
(190.3270) Nonlinear optics : Kerr effect

Citation
Yanli Zhang, Xiaoyan Li, Yan Zhang, Pingping Sun, and Jianqiang Zhu, "Small-scale self-focusing of divergent beam in nonlinear media with loss," Chin. Opt. Lett. 8, 210-212 (2010)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-8-2-210

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