Modulational Instability in Nonlinearity-Managed Optical Media
Abstract
We investigate analytically, numerically, and experimentally the modulational instability in a layered, cubically-nonlinear (Kerr) optical medium that consists of alternating layers of glass and air. We model this setting using a nonlinear Schr\"odinger (NLS) equation with a piecewise constant nonlinearity coefficient and conduct a theoretical analysis of its linear stability, obtaining a Kronig-Penney equation whose forbidden bands correspond to the modulationally unstable regimes. We find very good {\it quantitative} agreement between the theoretical analysis of the Kronig-Penney equation, numerical simulations of the NLS equation, and the experimental results for the modulational instability. Because of the periodicity in the evolution variable arising from the layered medium, we find multiple instability regions rather than just the one that would occur in uniform media.
Cite
@article{arxiv.nlin/0611028,
title = {Modulational Instability in Nonlinearity-Managed Optical Media},
author = {Martin Centurion and Mason A. Porter and Ye Pu and P. G. Kevrekidis and D. J. Frantzeskakis and Demetri Psaltis},
journal= {arXiv preprint arXiv:nlin/0611028},
year = {2009}
}
Comments
13 pages, 12 figures (several with multiple parts); some important changes from the page proof stage implemented in this preprint version