Asymmetric spectrum evolution of high power short pulses in AlGaAs waveguides

Year: 2005

Authors: Modotto D., Mondia J.P., Linden S., Tan H.W., Morandotti R., Kleckner T. C., Locatelli A., De Angelis C., van Driel H. M., Stanley C. R., Aitchison J.S.

Autors Affiliation: Dipartimento di Elettronica per lAutomazione, Universita` di Brescia, via Branze, 38, 25123 Brescia, Italy; Department of Physics, University of Toronto, Toronto, Canada M5R 2Z2; Institut National de la Recherche Scientifique, Universite´ du Quebec, Varennes, Canada J3X 1S2; Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow G12 8LT, UK; Department of Electrical and Computer Engineering, University of Toronto, Toronto, Canada M5S 3G4

Abstract: We measured the self-phase modulation spectra at the output of deep-etched AlGaAs waveguides. The light source was an OPO laser system providing 250 fs long pulses, at wavelengths around 1520 nm, with a peak power as high as 1 kW. FROG measurements of the OPO pulses reveal their asymmetric shape. The multi-peak spectra, observed at the waveguide output, show a dramatic asymmetry and a power shift towards short wavelengths. The interplay between the Kerr non-linearity, dispersion and self-steepening amplifies the initial slight asymmetry of the injected spectrum. Experimental results compare favourably with the numerical solution of the generalized non-linear Schrodinger equation. (c) 2005 Elsevier B.V. All rights reserved.


Volume: 249 (1-3)      Pages from: 201  to: 208

KeyWords: Nonlinear Optics
DOI: 10.1016/j.optcom.2005.01.023

Citations: 9
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