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Proceedings Paper

Effect of dispersion and nonlinearity on intense femtosecond pulse propagation in GaAs/AlGaAs waveguide structure
Author(s): Abbas Ali Koser; Pratima Sen; Pranay K. Sen
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Paper Abstract

Ultra fast pulse evolution in a semiconductor quantum well structure (QWS) is theoretically analyzed using split-step Fourier method. The induced polarization in the medium has been obtained using Semiconductor Bloch equations. The non-linear Schrödinger equation is numerically solved by taking into account the induced polarization. So far, the pulse shape studies are based on the group velocity dispersion (GVD), third-order dispersion (TOD) and self phase modulation (SPM) effects. However, at high excitation intensity the group velocity also becomes intensity dependent. In the present analysis, the interplay of GVD, TOD and SPM leading to the change in pulse shape is studied giving due consideration to the intensity dependent group velocity of the medium. The result of numerical analysis made for a GaAs/AlGaAs QWS manifests significant influence of intensity dependent group velocity on the pulse shape.

Paper Details

Date Published: 6 January 2011
PDF: 8 pages
Proc. SPIE 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics, 799304 (6 January 2011); doi: 10.1117/12.879579
Show Author Affiliations
Abbas Ali Koser, Medi-Caps Institute of Technology and Management (India)
Pratima Sen, Devli Ahilya Vishvavidyalaya (India)
Pranay K. Sen, Shri G.S. Institute of Technology & Science (India)

Published in SPIE Proceedings Vol. 7993:
ICONO 2010: International Conference on Coherent and Nonlinear Optics
Claude Fabre; Victor Zadkov; Konstantin Drabovich, Editor(s)

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