Effect of dispersion and nonlinearity on intense femtosecond pulse propagation in GaAs/AlGaAs waveguide structure

Abbas Ali Koser; Pratima Sen; Pranay K. Sen

doi:10.1117/12.879579

6 January 2011 Effect of dispersion and nonlinearity on intense femtosecond pulse propagation in GaAs/AlGaAs waveguide structure

Abbas Ali Koser, Pratima Sen, Pranay K. Sen

Author Affiliations +

Proceedings Volume 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics; 799304 (2011) https://doi.org/10.1117/12.879579
Event: International Conference on Coherent and Nonlinear Optics (ICONO 2010) and International Conference on Lasers, Applications and Technologies (LAT 2010), 2010, Kazan, Russian Federation

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.

Citation Download Citation

Abbas Ali Koser, Pratima Sen, and Pranay K. Sen "Effect of dispersion and nonlinearity on intense femtosecond pulse propagation in GaAs/AlGaAs waveguide structure", Proc. SPIE 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics, 799304 (6 January 2011); https://doi.org/10.1117/12.879579

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KEYWORDS

Dispersion

Quantum wells

Wave propagation

Waveguides

Scanning probe microscopy

Femtosecond phenomena

Semiconductors

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