Open AccessPower transmission coefficients for multi-step index optical fibres
Author(s) -
Gotzon Aldabaldetreku,
Joseba Zubía,
Gaizka Durana,
J. Arrué
Publication year - 2006
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.001413
Subject(s) - wkb approximation , optics , transmission coefficient , transmission (telecommunications) , attenuation , optical power , attenuation coefficient , refractive index , expression (computer science) , scalar (mathematics) , physics , limit (mathematics) , helmholtz equation , optical fiber , quantum tunnelling , materials science , mathematical analysis , computer science , mathematics , telecommunications , optoelectronics , quantum mechanics , geometry , laser , boundary value problem , programming language
The aim of the present paper is to provide a single analytical expression of the power transmission coefficient for leaky rays in multi-step index (MSI) fibres. This expression is valid for all tunnelling and refracting rays and allows us to evaluate numerically the power attenuation along an MSI fibre of an arbitrary number of layers. We validate our analysis by comparing the results obtained for limit cases of MSI fibres with those corresponding to step-index (SI) and graded-index (GI) fibres. We also make a similar comparison between this theoretical expression and the use of the WKB solutions of the scalar wave equation.