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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 36 — Dec. 20, 2003
  • pp: 7117–7120

Sonographic probing of laser filaments in air

Jin Yu, Didier Mondelain, Jérôme Kasparian, Estelle Salmon, Sylvain Geffroy, Catherine Favre, Véronique Boutou, and Jean-Pierre Wolf  »View Author Affiliations


Applied Optics, Vol. 42, Issue 36, pp. 7117-7120 (2003)
http://dx.doi.org/10.1364/AO.42.007117


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Abstract

The acoustic wave emitted from the plasma channel associated with a filament induced by a femtosecond laser pulse in air was detected with a microphone. This sonographic detection provides a new method to determine the length and the spatial profile of the free-electron density of a filament. The acoustic wave is emitted owing to the expansion of the gas in the filament, which is heated through collisions with high-energy photoelectrons generated by multiphoton ionization. Compared with other methods, the acoustic detection is simpler, more sensitive, and with higher spatial resolution, making it suitable for field measurements over kilometer-range distances or laboratory-scale studies on the fine structure of a filament.

© 2003 Optical Society of America

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(190.4180) Nonlinear optics : Multiphoton processes
(190.5940) Nonlinear optics : Self-action effects
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(350.5400) Other areas of optics : Plasmas

History
Original Manuscript: April 11, 2003
Revised Manuscript: July 23, 2003
Published: December 20, 2003

Citation
Jin Yu, Didier Mondelain, Jérôme Kasparian, Estelle Salmon, Sylvain Geffroy, Catherine Favre, Véronique Boutou, and Jean-Pierre Wolf, "Sonographic probing of laser filaments in air," Appl. Opt. 42, 7117-7120 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-36-7117

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