Publication:
Ultrahigh-sensitivity sensors based on thin-film coated long period gratings with reduced diameter, in transition mode and near the dispersion turning point

Date

2015

Director

Publisher

Optical Society of America
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión publicada / Argitaratu den bertsioa

Project identifier

MINECO//TEC2013-43679-R/ES/recolecta

Abstract

The mode transition and the dispersion turning point have been explored for optimization of thin-film coated long period fiber gratings during the last years. In this work and additional parameter, the cladding diameter, is combined with the other two phenomena for improving the sensitivity to the surrounding medium refractive index. The numerical data obtained were calculated with a method based on the exact calculation of core and cladding modes and the utilization of coupled mode theory. A sensitivity 143 × 103 nm/RIU is obtained, the highest reported so far with long period fiber gratings.

Description

Keywords

Fiber optics sensors, Fiber Bragg gratings, Thin films

Department

Ingeniería Eléctrica y Electrónica / Ingeniaritza Elektrikoa eta Elektronikoa

Faculty/School

Degree

Doctorate program

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