Open AccessGuidance properties of low-contrast photonic bandgap fibres
Author(s) -
Alexander Argyros,
T.A. Birks,
Sergio Leon-Saval,
Cristiano M. B. Cordeiro,
P. St. J. Russell
Publication year - 2005
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.002503
Subject(s) - cladding (metalworking) , optics , materials science , rod , refractive index , wavelength , photonic crystal , leakage (economics) , cutoff frequency , photonics , band gap , optoelectronics , physics , medicine , alternative medicine , pathology , economics , metallurgy , macroeconomics
We investigate the guidance properties of low-contrast photonic band gap fibres. As predicted by the antiresonant reflecting optical waveguide (ARROW) picture, band gaps were observed between wavelengths where modes of the high-index rods in the cladding are cutoff. At these wavelengths, leakage from the core by coupling to higher-order modes of the rods was observed directly. The low index contrast allowed for bend loss to be investigated; unlike in index-guiding fibres, anomalous "centripetal" light leakage through the inside of the bend can occur.