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Proceedings Paper

Highly stabilized laser intensity during ultra-short laser filamentation
Author(s): Shengqi Xu; Yizhu Zhang; Weiwei Liu
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Paper Abstract

In this work, we investigate the stability of the nitrogen fluorescence signal emitted by a femtosecond laser filament as an example of a high order nonlinear optical process. It is found that the root-mean-square fluctuation of the fluorescence signal emitted from the filament is less than 1 %. The corresponding estimated laser intensity fluctuation is as low as 0.14%, which is at least one order of magnitude lower than the input laser pulse power fluctuation. Further numerical simulation has confirmed that the intensity clamping phenomenon is responsible for this observation. Since the intensity clamping is an intrinsic property of filamentation phenomenon, it is expected that any intensity sensitive optical interaction taking place inside filament could lead to highly stabilized outcome. This conclusion potentially affects various applications of ultra-short laser filamentation.

Paper Details

Date Published: 18 February 2009
PDF: 9 pages
Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 727614 (18 February 2009); doi: 10.1117/12.823856
Show Author Affiliations
Shengqi Xu, Nankai Univ. (China)
Yizhu Zhang, Nankai Univ. (China)
Weiwei Liu, Nankai Univ. (China)


Published in SPIE Proceedings Vol. 7276:
Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications
Peixiang Lu; Katsumi Midorikawa; Bernd Wilhelmi, Editor(s)

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