Open AccessSensitivity optimization with cladding-etched long period fiber gratings at the dispersion turning point
Author(s) -
Ignacio Del Villar,
J.L. Cruz,
Abian B. Socorro,
Jesús M. Corres,
Ignacio R. Matı́as
Publication year - 2016
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.24.017680
Subject(s) - materials science , cladding mode , optics , cladding (metalworking) , long period fiber grating , refractive index , fiber bragg grating , all silica fiber , graded index fiber , photonic crystal fiber , fiber optic sensor , wavelength , optical fiber , grating , coating , optoelectronics , polarization maintaining optical fiber , composite material , physics
This work presents a refractive index sensor based on a long period fiber grating (LPFG) made in a reduced cladding fiber whose low order cladding modes have the turning point at large wavelengths. The combination of these parameters results in an improved sensitivity of 8734 nm/refractive index unit (RIU) for the LP 0,3 mode in the 1400-1650 wavelength range. This value is similar to that obtained with thin-film coated LPFGs, which permits to avoid the coating deposition step. The numerical simulations are in agreement with the experimental results.