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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 17 — Aug. 21, 2006
  • pp: 7552–7558

Nonlinear absorption of intense femtosecond laser radiation in air

D. V. Kartashov, A. V. Kirsanov, A. M. Kiselev, A. N. Stepanov, N. N. Bochkarev, Yu. N. Ponomarev, and B. A. Tikhomirov  »View Author Affiliations


Optics Express, Vol. 14, Issue 17, pp. 7552-7558 (2006)
http://dx.doi.org/10.1364/OE.14.007552


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Abstract

A new mechanism of nonlinear absorption of intense femtosecond laser radiation in air in the intensity range I = 1011-1012 W/cm2 when the ionization is not important yet is experimentally observed and investigated. This absorption is much greater than for nanosecond pulses. A model of the nonlinear absorption based on the rotational excitation of molecules by linearly polarized ultrashort pulses through the interaction of an induced dipole moment with an electric field is developed. The observed nonlinear absorption of intense femtosecond laser radiation can play an important role in the process of propagation of such radiation in the atmosphere.

© 2006 Optical Society of America

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(300.1030) Spectroscopy : Absorption
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

ToC Category:
Atmospheric and ocean optics

History
Original Manuscript: May 26, 2006
Revised Manuscript: July 3, 2006
Manuscript Accepted: July 30, 2006
Published: August 21, 2006

Citation
D. V. Kartashov, A. V. Kirsanov, A. M. Kiselev, A. N. Stepanov, N. N. Bochkarev, Yu. N. Ponomarev, and B. A. Tikhomirov, "Nonlinear absorption of intense femtosecond laser radiation in air," Opt. Express 14, 7552-7558 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-17-7552


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References

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