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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 3 — Feb. 1, 2014
  • pp: 505–508

Smoothed spectra for enhanced dispersion-free pulse duration reduction of passively Q-switched microchip lasers

R. Lehneis, C. Jauregui, A. Steinmetz, J. Limpert, and A. Tünnermann  »View Author Affiliations


Optics Letters, Vol. 39, Issue 3, pp. 505-508 (2014)
http://dx.doi.org/10.1364/OL.39.000505


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Abstract

We present an enhanced technique for dispersion-free pulse shortening, which exploits the interplay of different third-order nonlinear effects in a waveguide structure. When exceeding a certain value of the pulse energy coupled into the waveguide, the typical oscillations of self-phase modulation (SPM)-broadened spectra vanish during pulse propagation. Such smoothed spectra ensure a high pulse quality of the spectrally filtered and, therefore, temporally shortened pulses independently of the filtering position. A reduction of the pulse duration from 138 to 24 ps has been achieved while preserving a high temporal quality. To the best of our knowledge, the nonlinear smoothing of SPM-broadened spectra is used in the context of dispersion-free pulse duration reduction for the first time.

© 2014 Optical Society of America

OCIS Codes
(140.3540) Lasers and laser optics : Lasers, Q-switched
(320.5520) Ultrafast optics : Pulse compression
(320.5540) Ultrafast optics : Pulse shaping

ToC Category:
Ultrafast Optics

History
Original Manuscript: October 11, 2013
Manuscript Accepted: December 4, 2013
Published: January 23, 2014

Citation
R. Lehneis, C. Jauregui, A. Steinmetz, J. Limpert, and A. Tünnermann, "Smoothed spectra for enhanced dispersion-free pulse duration reduction of passively Q-switched microchip lasers," Opt. Lett. 39, 505-508 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-3-505


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