Open AccessHybrid fiber grating cavity for multi-parametric sensing
Author(s) -
Domenico Paladino,
Giuseppe Quero,
Christophe Caucheteur,
Patrice Mégret,
A. Cusano
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.010473
Subject(s) - cladding mode , fiber bragg grating , optics , materials science , cladding (metalworking) , phosfos , interferometry , wavelength , fiber optic sensor , long period fiber grating , optical fiber , reflection (computer programming) , interference (communication) , polarization maintaining optical fiber , optoelectronics , physics , channel (broadcasting) , electrical engineering , metallurgy , engineering , computer science , programming language
We propose an all-fiber hybrid cavity involving two unbalanced uniform fiber Bragg gratings (FBGs) written at both sides of a tilted FBG (TFBG) to form an all-fiber interferometer. This configuration provides a wavelength gated reflection signal with interference fringes depending on the cavity features modulated by spectral dips associated to the wavelength dependent optical losses due to cladding mode coupling occurring along the TFBG. Such a robust structure preserves the advantages of uniform FBGs in terms of interrogation methods and allows the possibility of simultaneous physical and chemical sensing.