Open AccessNumerical study of nonlinear interactions in a multimode waveguide
Author(s) -
T. Chaipiboonwong,
Péter Horák,
J.D. Mills,
W.S. Brocklesby
Publication year - 2007
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.15.009040
Subject(s) - optics , nonlinear system , multi mode optical fiber , self phase modulation , waveguide , modulation (music) , phase modulation , physics , transverse plane , nonlinear optics , materials science , optical fiber , laser , phase noise , acoustics , structural engineering , quantum mechanics , engineering
Multimode nonlinear pulse propagation within a Ta(2)O(5) rectangular rib waveguide has been numerically simulated. The study provides information relating to both the localized spectral evolution along the waveguide and the transverse spectral variation across the guide. The results explain measurements from our previous near-field scanning microscopy experiments that were designed to map continuum generation along and across such waveguides, and that deviated significantly from simple theory. The simulations predict an increased nonlinear phase modulation compared to that occurring in nonlinear single-mode waveguides, due to intermodal nonlinear effects such as cross-phase modulation, leading to an enhanced spectral broadening.