Open AccessBroadband transmission in hollow-core Bragg fibers with geometrically distributed multilayered cladding
Author(s) -
Dora Juan Juan Hu,
G. Alagappan,
YongKee Yeo,
Perry Ping Shum,
Ping Wu
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.018671
Subject(s) - cladding (metalworking) , fiber bragg grating , materials science , optics , phosfos , quasiperiodic function , broadband , wavelength , optical fiber , optoelectronics , fiber optic sensor , plastic optical fiber , physics , composite material , condensed matter physics
For the first time, the quasiperiodic Bragg fibers with geometrically distributed multilayered cladding are proposed and analyzed. We demonstrate that hollow-core Bragg fibers with quasiperiodic dielectric multilayer cladding can achieve low loss transmission over a broadband wavelength range of more than an octave (from 0.81 μm to 1.7 μm). The periods of the Bragg blocks follows a geometrical progression with a common ratio r<rc, where rc is defined as the critical ratio of the periods of two adjacent Bragg blocks. The arrangement of the quasiperiodic cladding can significantly modify the characteristics of the fiber, leading to a broadening of the guiding range compared to a hollow Bragg fiber with uniform periodic multilayer cladding structure. In general, a larger r value results in a broader guiding range. More Bragg blocks in the cladding and more unit cells in each Bragg block lead to a lower fiber modal loss.