Open AccessEnhancement of chemical sensing capability in a photonic crystal fiber with a hollow high index ring defect at the center
Author(s) -
Jiyoung Park,
Se-Jin Lee,
Soan Kim,
Kyunghwan Oh
Publication year - 2011
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.19.001921
Subject(s) - cladding (metalworking) , photonic crystal fiber , materials science , optics , refractive index , photonic crystal , optical fiber , hexagonal lattice , fiber , optoelectronics , composite material , physics , antiferromagnetism , condensed matter physics
A new type of index-guided photonic crystal fiber is proposed to enhance chemical sensing capability by introducing a hollow high index ring defect that consists of the central air hole surrounded by a high index GeO2 doped SiO2 glass ring. Optical properties of the fundamental guided mode were numerically analyzed using the full-vector finite element method varying the design parameters of both the defects in the center and the hexagonal air-silica lattice in the cladding. Enhanced evanescent wave interaction in the holey region and lower confinement loss by an order of magnitude were achieved simultaneously, which shows a high potential in hyper sensitive fiber-optic chemical sensing applications.