Open AccessRealizing low loss air core photonic crystal fibers by exploiting an antiresonant core surround
Author(s) -
P. J. Roberts,
Daisy Williams,
B. J. Mangan,
H. Sabert,
F. Couny,
William J. Wadsworth,
T.A. Birks,
Jonathan C. Knight,
P. St. J. Russell
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.008277
Subject(s) - cladding (metalworking) , optics , photonic crystal , photonic crystal fiber , materials science , core (optical fiber) , optical fiber , optoelectronics , physics , metallurgy
The modal properties of an air core photonic crystal fiber which incorporates an anti-resonant feature within the region that marks the transition between the air core and the crystal cladding are numerically calculated. The field intensity at the glass/air interfaces is shown to be reduced by a factor of approximately three compared to a fiber with more conventional core surround geometry. The reduced interface field intensity comes at the expense of an increased number of unwanted core interface modes within the band gap. When the interface field intensity is associated with modal propagation loss, the findings are in accord with recent measurements on fabricated fibers which incorporate a similar antiresonant feature.