Enhancement of sensitivity in long period fiber gratings with deposition of low refractive index materials
Date
2005Version
Acceso abierto / Sarbide irekia
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Artículo / Artikulua
Version
Versión aceptada / Onetsi den bertsioa
Impact
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10.1364/OL.30.002363
Abstract
It was proved [Opt. Lett. 30, 720 (2005)] that the deposition of an overlay of higher refractive index than
that of the cladding on a long-period fiber grating (LPFG) causes large shifts in the attenuation bands induced
by the grating. The result is an enhancement of the sensitivity of the LPFG to variations in the ambient
and overlay refractive indices or the overlay thickness. The limitation ...
[++]
It was proved [Opt. Lett. 30, 720 (2005)] that the deposition of an overlay of higher refractive index than
that of the cladding on a long-period fiber grating (LPFG) causes large shifts in the attenuation bands induced
by the grating. The result is an enhancement of the sensitivity of the LPFG to variations in the ambient
and overlay refractive indices or the overlay thickness. The limitation of the previous design to materials
with higher refractive indices than that of the cladding of the LPFG is overcome with a five-layer
model. To this purpose, a first overlay of higher refractive index than that of the cladding of the LPFG will
enhance the sensitivity of the device to variations in the refractive index of a second overlay of lower refractive
index than that of the cladding of the LPFG. Moreover, it is proved that, if the second overlay is thick
enough, its behavior resembles that of an infinite layer [--]
Publisher
Optical Society of America
Published in
Optics Letters Vol. 30, Issue 18, pp. 2363-2365 (2005)
Departament
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektriko eta Elektronikoa Saila