Open AccessScalar time domain modeling and coupling of second harmonic generation process in GaAs discontinuous optical waveguide
Author(s) -
Alessandro Massaro,
V. Tasco,
M. T. Todaro,
R. Cingolani,
Massimo De Vittorio,
A. Passaseo
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.014496
Subject(s) - optics , second harmonic generation , quasi phase matching , waveguide , nonlinear system , scalar (mathematics) , time domain , nonlinear optics , classification of discontinuities , dielectric , high harmonic generation , physics , mathematical analysis , computer science , optoelectronics , mathematics , laser , geometry , quantum mechanics , computer vision
We present in this work the scalar potential formulation of second harmonic generation process in chi((2)) nonlinear analysis. This approach is intrinsically well suited to the applications of the concept of circuit analysis and synthesis to nonlinear optical problems, and represents a novel alternative method in the analysis of nonlinear optical waveguide, by providing a good convergent numerical solution. The time domain modeling is applied to nonlinear GaAs asymmetrical waveguide with dielectric discontinuities in the hypothesis of quasi phase matching condition in order to evaluate the efficiency conversion of the second harmonic signal. The accuracy of the modeling is validated by the good agreement with the published experimental results. The effective dielectric constant method allows to extend the analysis also to 3D optical waveguides.