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Comprehensive finite-difference time-dependent beam propagation model of counterpropagating picosecond pulses in a semiconductor optical amplifier

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dc.contributor.author Razaghi, Mohammad
dc.contributor.author Ahmadi, Vahid
dc.contributor.author Connelly, Michael J.
dc.date.accessioned 2011-07-19T10:52:01Z
dc.date.available 2011-07-19T10:52:01Z
dc.date.issued 2009
dc.identifier.uri http://hdl.handle.net/10344/1112
dc.description peer-reviewed en_US
dc.description.abstract In this paper, we present a numerical model to study counter pulse propagation in semiconductor optical amplifiers. An improved finite-difference beam propagation method for solving the modified nonlinear Schrödinger equation is applied for the first time in the counterpropagation regime. In our model, group velocity dispersion, two-photon absorption, ultrafast nonlinear refraction, and the change in the gain peak wavelength with carrier density are included, which have not been considered simultaneously in previous counterpropagation models. The model is applied to demonstrate how a subpicosecond and picosecond probe pulse shape and spectrum can be modified by a counterpropagating pump pulse. Based on the results obtained by this model, while subpicosecond probe pulses can be compressed by in this scheme, their time-bandwidth product are also improved significantly. Furthermore, the effects of several parameters are analyzed to obtain the proper probe spectral peak shift using counterpropagating probe pulses. The accuracy and computational efficiency of the new scheme are assessed through numerical examples and are shown to be superior to previously published approaches. en_US
dc.language.iso eng en_US
dc.publisher IEEE Computer Society en_US
dc.relation.ispartofseries Journal of Lightwave Technology;27/ 15/ pp.3162-3174
dc.relation.uri http://dx.doi.org/10.1109/JLT.2008.2008823
dc.subject counterpropagation en_US
dc.subject pulse shaping en_US
dc.subject semiconductor optical amplifier en_US
dc.subject ultrafast nonlinear effects en_US
dc.title Comprehensive finite-difference time-dependent beam propagation model of counterpropagating picosecond pulses in a semiconductor optical amplifier en_US
dc.type Article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.type.restriction none en
dc.contributor.sponsor Iran Telecommunication Research Center (ITRC)
dc.relation.projectid T/500/8482
dc.internal.rssid 1129267
dc.internal.authorcontactother Michael.connelly@ul.ie


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