Open AccessDirectional couplers operated by resonant coupling in all-solid photonic bandgap fibers
Author(s) -
Zhi Wang,
Yange Liu,
Guiyun Kai,
Jianguo Liu,
Yan Li,
Tao Sun,
Long Jin,
Yang Yue,
Weigang Zhang,
Shuzhong Yuan,
Xinyong Dong
Publication year - 2007
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.15.008925
Subject(s) - cladding (metalworking) , rod , materials science , optics , power dividers and directional couplers , photonic bandgap , photonic crystal , refractive index , optical fiber , coupling (piping) , optoelectronics , photonic crystal fiber , core (optical fiber) , photonics , polarization (electrochemistry) , band gap , physics , composite material , medicine , chemistry , alternative medicine , pathology
We have proposed directional couplers operated by resonant coupling in all-solid photonic bandgap fibers structure which consist of a cladding with an array of high-index rods in silica background, two cores formed by omitting two rods, and some defect rods introduced by reducing the diameter of the high-index rods between the cores. The resonant effect induced by the avoided crossing between core-guided supermodes and defect-guided modes significant decreases the coupling length. The directional couplers proposed in this paper are almost polarization independent and have potential application in realizing integrating all-fiber communication devices.