Optimization of sensitivity in long period fiber gratings with overlay deposition
Fecha
2005Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Impacto
|
10.1364/OPEX.13.000056
Resumen
The deposition of an overlay of higher refractive index than the
cladding in a Long Period Fiber Grating (LPFG) permits to improve the
sensitivity to ambient refractive index changes in a great manner. When the
overlay is thick enough, one of the cladding modes is guided by the overlay.
This causes important shifts in the effective index values of the cladding
modes, and henceforward fast shifts ...
[++]
The deposition of an overlay of higher refractive index than the
cladding in a Long Period Fiber Grating (LPFG) permits to improve the
sensitivity to ambient refractive index changes in a great manner. When the
overlay is thick enough, one of the cladding modes is guided by the overlay.
This causes important shifts in the effective index values of the cladding
modes, and henceforward fast shifts of the resonance wavelength of the
attenuations bands in the transmission spectrum. This could be applied for
improving the sensitivity of LPFG sensors. The problem is analysed with a
numerical method based on LP mode approximation and coupled mode
theory, which agrees with so far published experimental results. [--]
Materias
Long Period Fiber Grating (LPFG),
Cladding modes,
Overlay deposition
Editor
Optical Society of America
Publicado en
Optics Express, Vol. 13, Issue 1, pp. 56-69 (2005)
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Versión del editor
Entidades Financiadoras
This work was supported by Spanish Ministerio de Ciencia y Tecnologia and FEDER
Research Grants CICYT-TIC 2003-00909, Gobierno de Navarra and FPU MECD Grant.