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    Enhancement of sensitivity in long period fiber gratings with deposition of low refractive index materials

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    delvillaretal_optlett_2005_2_finalfile.pdf (94.73Kb)
    Date
    2005
    Author
    Del Villar, Ignacio Upna
    Matías Maestro, Ignacio Upna
    Arregui San Martín, Francisco Javier Upna
    Version
    Acceso abierto / Sarbide irekia
    xmlui.dri2xhtml.METS-1.0.item-type
    Artículo / Artikulua
    Version
    Versión aceptada / Onetsi den bertsioa
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    10.1364/OL.30.002363
     
     
     
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    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 [--]
    Subject
    Long period fiber Bragg gratings, Optical fiber sensors, Thin-films, Coupled-mode theory
     
    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
     
    Publisher version
    https://doi.org/10.1364/OL.30.002363
    URI
    https://hdl.handle.net/2454/28198
    Appears in Collections
    • Artículos de revista DIEE - IEES Aldizkari artikuluak [346]
    • Artículos de revista - Aldizkari artikuluak [2947]
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