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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 8 — Apr. 15, 2014
  • pp: 2232–2235

Conversion of chirp in fiber compression

Péter Dombi, Péter Rácz, Laszlo Veisz, and Peter Baum  »View Author Affiliations

Optics Letters, Vol. 39, Issue 8, pp. 2232-2235 (2014)

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Focusing positively chirped femtosecond pulses into nonlinear fibers provides significant spectral broadening and compression at higher pulse energies than achievable conventionally because self-focusing and damage are avoided. Here, we investigate the transfer of input to output chirp in such an arrangement. Our measurements show that the group delay dispersion of the output pulse, originating from the nonlinearities, is considerably reduced as compared to the initial value, by about a factor of 10. The mechanism of chirp reduction is understood by an interplay of self-phase modulation with initial chirp within the fiber. A simple model calculation based on this picture yields satisfactory agreement with the observations and predicts significant chirp reduction for input pulses up to the μJ regime. In practice, the reduction of chirp observed here allows for compressing the spectrally broadened intense pulses by ultrabroadband dispersive multilayer mirrors of quite moderate dispersion.

© 2014 Optical Society of America

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(320.1590) Ultrafast optics : Chirping
(320.5520) Ultrafast optics : Pulse compression

ToC Category:
Ultrafast Optics

Original Manuscript: January 22, 2014
Manuscript Accepted: March 2, 2014
Published: April 3, 2014

Péter Dombi, Péter Rácz, Laszlo Veisz, and Peter Baum, "Conversion of chirp in fiber compression," Opt. Lett. 39, 2232-2235 (2014)

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