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

Volume

23

Issue

20

fYear

2011

Firstpage

1472

Lastpage

1474

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2163063

Filename

5985479