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

Ignacio Del Villar | Zendy; J.L. Cruz | Zendy; Abián B. Socorro | Zendy; Jesús M. Corres | Zendy; Ignacio R. Matı́as | Zendy

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

Author(s) -

Ignacio Del Villar,

J.L. Cruz,

Abián 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 , optics , cladding (metalworking) , cladding mode , long period fiber grating , refractive index , fiber bragg grating , graded index fiber , fiber optic sensor , wavelength , photonic crystal fiber , all silica fiber , coating , optical fiber , grating , 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.

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