Open AccessFiber optic humidity sensor using water vapor condensation
Author(s) -
Hamid E Limodehi,
François Légaré
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.015313
Subject(s) - materials science , water vapor , refractive index , humidity , surface plasmon resonance , optics , relative humidity , fiber optic sensor , optical fiber , condensation , dielectric , fiber , moisture , optoelectronics , nanotechnology , composite material , chemistry , meteorology , physics , organic chemistry , nanoparticle
The rate of vapor condensation on a solid surface depends on the ambient relative humidity (RH). Also, surface plasmon resonance (SPR) on a metal layer is sensitive to the refractive index change of its adjacent dielectric. The SPR effect appears as soon as a small amount of moisture forms on the sensor, resulting in a decrease in the amount of light transmitted due to plasmonic loss. Using this concept, we developed a fiber optic humidity sensor based on SPR. It can measure the ambient RH over a dynamic range from 10% to 85% with an accuracy of 3%.