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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 4 — Feb. 25, 2013
  • pp: 4740–4751

The effect of long timescale gas dynamics on femtosecond filamentation

Y.-H. Cheng, J. K. Wahlstrand, N. Jhajj, and H. M. Milchberg  »View Author Affiliations


Optics Express, Vol. 21, Issue 4, pp. 4740-4751 (2013)
http://dx.doi.org/10.1364/OE.21.004740


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Abstract

Femtosecond laser pulses filamenting in various gases are shown to generate long- lived quasi-stationary cylindrical depressions or ‘holes’ in the gas density. For our experimental conditions, these holes range up to several hundred microns in diameter with gas density depressions up to ~20%. The holes decay by thermal diffusion on millisecond timescales. We show that high repetition rate filamentation and supercontinuum generation can be strongly affected by these holes, which should also affect all other experiments employing intense high repetition rate laser pulses interacting with gases.

© 2013 OSA

OCIS Codes
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons
(260.5950) Physical optics : Self-focusing
(350.6830) Other areas of optics : Thermal lensing
(320.6629) Ultrafast optics : Supercontinuum generation

ToC Category:
Nonlinear Optics

History
Original Manuscript: January 16, 2013
Revised Manuscript: February 11, 2013
Manuscript Accepted: February 11, 2013
Published: February 19, 2013

Citation
Y.-H. Cheng, J. K. Wahlstrand, N. Jhajj, and H. M. Milchberg, "The effect of long timescale gas dynamics on femtosecond filamentation," Opt. Express 21, 4740-4751 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-4-4740


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