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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 18 — Sep. 15, 2013
  • pp: 3635–3638

Origin and control of the subpicosecond pedestal in femtosecond laser systems

D. Kaganovich, J. R. Peñano, M. H. Helle, D. F. Gordon, B. Hafizi, and A. Ting  »View Author Affiliations


Optics Letters, Vol. 38, Issue 18, pp. 3635-3638 (2013)
http://dx.doi.org/10.1364/OL.38.003635


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Abstract

The picosecond time scale pedestal of a multiterawatt femtosecond laser pulse is investigated experimentally and analytically. The origin of the pedestal is related to the finite bandwidth of the laser system. By deliberately introducing a modulated spectrum with minima that match this limited bandwidth, the pedestal can be reduced, with no deleterious effect on the main pulse. Using this technique, we experimentally demonstrate a subpicosecond scale order of magnitude enhancement of contrast ratio while preserving the energy in the main pulse.

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(190.7110) Nonlinear optics : Ultrafast nonlinear optics

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 3, 2013
Revised Manuscript: August 6, 2013
Manuscript Accepted: August 15, 2013
Published: September 12, 2013

Citation
D. Kaganovich, J. R. Peñano, M. H. Helle, D. F. Gordon, B. Hafizi, and A. Ting, "Origin and control of the subpicosecond pedestal in femtosecond laser systems," Opt. Lett. 38, 3635-3638 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-18-3635

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