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Proceedings ArticleDOI

Numerical analysis of the propagation of light in a disordered waveguide system

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TLDR
In this article, the propagation properties of light in a disordered waveguide system composed of randomly different cores in size are presented by numerically solving the coupled mode equation and the propagation constants of the modes are assumed to be a random variable.
Abstract
The propagation properties of light in a disordered waveguide system composed of randomly different cores in size are presented by numerically solving the coupled mode equation. The propagation constants of the modes are assumed to be a random variable. When one of cores is illuminated at the input end of the waveguide system the coherent part of the amplitude of light decreases exponentially with increasing distance and at large distance only the incoherent part propagates. The incoherent part is concentrated into a narrow region near the illuminated core in the cross section of the waveguide system and the distribution does not almost change along the waveguide axis.

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Absence of Diffusion in Certain Random Lattices

TL;DR: In this article, a simple model for spin diffusion or conduction in the "impurity band" is presented, which involves transport in a lattice which is in some sense random, and in them diffusion is expected to take place via quantum jumps between localized sites.
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Coherent-Potential Model of Substitutional Disordered Alloys

TL;DR: In this paper, a substitutional alloy based on the concept of an effective or coherent potential was introduced, which, when placed on every site of the alloy lattice, will simulate the electronic properties of the actual alloy.
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Coupled-Mode Theory for Optical Fibers

TL;DR: In this paper, a set of coupled-mode equations is derived to describe mode propagation in uniform and slightly nonuniform cylindrical optical-fiber systems, and the coupling between fibers of an array made up of n identical fibers each at the vertex of a polygon and one at the center, which is not necessarily the same as its n neighbors, is determined.
Journal ArticleDOI

Self-consistent theory of Anderson localization for the tight-binding model with site-diagonal disorder.

TL;DR: Presentation d'une theorie autocoherente de la conductivite dependante de la frequence, sans parametres ajustables, pour un modele de liaison forte a niveaux d'energie aleatoires utilisant l'expansion spatiale du localisateur.
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