Refractometric sensors based on multimode interference in a thin-film coated singlemode– multimode–single-mode structure with reflection configuration
Fecha
2014Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Impacto
|
10.1364/AO.53.003913
Resumen
Thin-film coated single-mode–multimode–single-mode (SMS) structures have been analyzed both theoretically
and experimentally with the aim of detecting different refractive indices. By adequate selection
of the thickness of the thin film and of the diameter of the multimode segment in the SMS structure, a
seven-fold improvement can be obtained in the sensitivity of the device to the surrounding ...
[++]
Thin-film coated single-mode–multimode–single-mode (SMS) structures have been analyzed both theoretically
and experimentally with the aim of detecting different refractive indices. By adequate selection
of the thickness of the thin film and of the diameter of the multimode segment in the SMS structure, a
seven-fold improvement can be obtained in the sensitivity of the device to the surrounding medium
refractive index, achieving a maximum sensitivity of 1199.18 nm∕refractive index unit for the range
of refractive indices from 1.321 to 1.382. Using layer-by-layer self-assembly for deposition, both on
the cladding and on the tip of the multimode segment, allows the reflected power to increase, which
avoids the application of a mirror on the tip of the multimode segment. [--]
Materias
Fiber optics sensors,
Thin films,
Interferometry
Editor
Optical Society of America
Publicado en
Applied Optics Vol. 53, Issue 18, pp. 3913-3919 (2014)
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 in part by the Spanish Ministry of Education and Science-FEDER TEC2010-17805 and Government of Navarra research grants.