Simple Fresnel Reflection-Based Optical Fiber Sensor for Multipoint Refractive Index Measurement Using an AWG

Author

Chun-Liu Zhao ; Jihui Li ; Shuqin Zhang ; Zaixuan Zhang ; Shangzhong Jin

Author_Institution

Inst. of Optoelectron. Technol., China Jiliang Univ., Hangzhou, China

Volume

25

Issue

6

fYear

2013

fDate

15-Mar-13

Firstpage

606

Lastpage

608

Abstract

A simple Fresnel reflection-based optical fiber refractometer for simultaneous multipoint measurement based on an arrayed-waveguide grating (AWG) is proposed. The AWG is used as a demultiplexing unit and different channel fibers of the AWG work as different sensor heads. Every channel light divided by the AWG is marked with a different central wavelength, and its reflection from its fiber-solution interface is used to measure the RI of the inserted solution. By using the AWG unit, a simple and compact structure sensor for multipoint sensing is achieved. Experiment results show that the sensor works well and the average sensitivity is ~ 01.9 dB/RIU for refractive indices, in the range of 1.33-1.42.

Keywords

arrayed waveguide gratings; fibre optic sensors; refractive index measurement; refractometers; AWG; Fresnel reflection-based optical fiber refractometer; Fresnel reflection-based optical fiber sensor; arrayed-waveguide grating; channel fibers; multipoint measurement; multipoint refractive index measurement; multipoint sensing; Arrayed waveguide gratings; Optical fiber sensors; Optical fibers; Optical variables measurement; Reflection; Arrayed-waveguide grating (AWG); fresnel reflection; multipoint measurement; optic-fiber sensor; refractive index sensing;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2243833

Filename

6423788