Title :
Refractive Index Sensor for Liquids and Solids Using Dielectric Multilayer Films Deposited on Optical Fiber End Surface
Author :
Kyung-Su Kim ; Mizuno, Yosuke ; Nakano, M. ; Onoda, S. ; Nakamura, Kentaro
Author_Institution :
Precision & Intell. Lab., Tokyo Inst. of Technol., Yokohama, Japan
Abstract :
We propose and demonstrate a novel fiber-optic refractive index (RI) sensor using dielectric multilayer thin films (DMFs) deposited on an optical fiber end surface, which rejects the incident light with particular wavelength. We experimentally show that the center frequency of the reflected light spectrum changes in proportion to the RI of six kinds of liquids attached to the fiber end. Its coefficient of + 0.61 nm/RIU (refractive index unit) agrees well with our simulation results based on characteristic-matrix technique. We also show that this sensor is applicable to the RI measurement of solids.
Keywords :
dielectric thin films; fibre optic sensors; light reflection; optical films; optical multilayers; refractive index measurement; characteristic-matrix technique; dielectric multilayer thin films; fiber-optic refractive index sensor; optical fiber end surface; reflected light spectrum; refractive index unit; Bragg gratings; Liquids; Optical fiber sensors; Optical fibers; Solids; Temperature sensors; Bandpass filter; dielectric multilayer film; optical fiber sensor; refractive index sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2163063
