Title :
High-sensitivity temperature sensor based on overlay on side-polished fibers
Author :
Álvarez-Herrero, Alberto ; Guerrero, H. ; Belenguer, T. ; Levy, D.
Author_Institution :
Div. de Ciencias del Espacio, Lab. de Instrumentacion Espacial, Madrid, Spain
Abstract :
A temperature sensor based on overlay on side-polished fibers is presented. It works on the basis of the evanescent field coupling between a single-mode side-polished optical fiber and a dielectric waveguide overlay. The spectrum of a white light beam transmitted through the former system exhibit sharp and deep regularly spaced resonances whose central wavelenths are linearly shifted with temperature. It has a wavelength sensitivity of /spl sim/1 nm//spl deg/C, which is one order of magnitude better than that obtained with fiber Bragg sensors.
Keywords :
fibre optic sensors; optical fibre cladding; optical fibre couplers; optical fibre losses; sensitivity; temperature measurement; temperature sensors; central wavelengths; dielectric waveguide overlay; evanescent field coupling; fiber Bragg sensors; high-sensitivity temperature sensor; linearly shifted wave lengths; overlay; regularly spaced resonances; side-polished fibers; single-mode side-polished optical fiber; temperature sensor; wavelength sensitivity; white light beam; Dielectrics; Optical coupling; Optical fiber devices; Optical fiber sensors; Optical fibers; Optical films; Optical refraction; Optical waveguides; Resonance; Temperature sensors;
Journal_Title :
Photonics Technology Letters, IEEE
