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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 16 — Aug. 15, 2007
  • pp: 2432–2434

Sub- 10 - fs supercontinuum radiation generated by filamentation of few-cycle 800 nm pulses in argon

Sergei A. Trushin, Kyriaki Kosma, Werner Fuß, and Wolfram E. Schmid  »View Author Affiliations


Optics Letters, Vol. 32, Issue 16, pp. 2432-2434 (2007)
http://dx.doi.org/10.1364/OL.32.002432


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Abstract

Focusing 12 fs pulses of 800 nm with moderate energy ( 0.35 mJ ) into atmospheric-pressure argon (Ar) gives rise to filamentation (self-focusing) and a supercontinuum with a very broad pedestal, extending to 250 nm . According to the present understanding, the short wavelengths are produced by self-phase modulation in the self-steepened trailing edge of the pulse. Pulses in this spectral range might thus be intrinsically short. Indeed we demonstrate this by extracting the light near the end of the filament, terminating self-focusing by a pressure gradient at a pinhole, beyond which the Ar is pumped away. We obtain pulses of 9.7 fs in the region of 290 nm without the necessity of compression.

© 2007 Optical Society of America

OCIS Codes
(190.5940) Nonlinear optics : Self-action effects
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.7150) Ultrafast optics : Ultrafast spectroscopy

ToC Category:
Nonlinear Optics

History
Original Manuscript: May 29, 2007
Manuscript Accepted: July 3, 2007
Published: August 8, 2007

Citation
Sergei A. Trushin, Kyriaki Kosma, Werner Fuß, and Wolfram E. Schmid, "Sub-10-fs supercontinuum radiation generated by filamentation of few-cycle 800 nm pulses in argon," Opt. Lett. 32, 2432-2434 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-16-2432

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