Optimized strain long-period fiber grating (LPFG) sensors operating at the dispersion turning point
Fecha
2018Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Identificador del proyecto
ES/1PE/TEC2016-78047-R
Impacto
|
10.1109/JLT.2018.2790434
Resumen
Two phenomena for enhancing the sensitivity of longperiod
fiber gratings are combined toward an increase of the sensitivity
to strain of this type of devices: the dispersion turning point
(DTP) and the cladding diameter reduction by an etching process.
The results prove that sensitivities up to 20 pm/με can be attained,
which is a ten-fold improvement compared to the previous works.
The sen ...
[++]
Two phenomena for enhancing the sensitivity of longperiod
fiber gratings are combined toward an increase of the sensitivity
to strain of this type of devices: the dispersion turning point
(DTP) and the cladding diameter reduction by an etching process.
The results prove that sensitivities up to 20 pm/με can be attained,
which is a ten-fold improvement compared to the previous works.
The sensitivity in the grating region, which is subjected to etching,
does not depend on the order of the cladding mode responsible for
the attenuation bands generated in the transmission spectrum, but
on the proximity to the DTP for each mode order. On the other
hand, the sensitivity to strain of the global structure, including the
region without etching, can be increased for lower order modes
in a perceptible way if the length of the etched region is smaller
compared to the fiber region under stress. The experimental results
are supported with simulations based on coupled-mode theory and
on FIMMWAVE, which allows understanding the phenomena involved
during the sensing process. [--]
Materias
Dispersion turning point,
Etching,
Long period fiber grating,
Strain sensor
Editor
IEEE
Publicado en
Journal of Lightwave Technology Vol. 36, No. 11, June 1 2018
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila /
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute of Smart Cities - ISC
Versión del editor
Entidades Financiadoras
This work was supported in part by the Spanish Ministry
of Economy and Competitiveness (TEC2016-78047-R – AEI/FEDER, UE), in
part by the Government of Navarra PI044 NANOSEN, and in part by the Pinar
del Río University.