Sensitivity optimization with cladding-etched long period fiber gratings at the dispersion turning point

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 uni...

Full description

Saved in:
Bibliographic Details
Published in:Optics express 2016-08, Vol.24 (16), p.17680-17685
Main Authors: Del Villar, Ignacio, Cruz, Jose L, Socorro, Abian B, Corres, Jesus M, Matias, Ignacio R
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.24.017680