Liquid Refractive Index Sensor Based on a Polarization-Maintaining Fiber Loop Mirror

Author

Jianfeng Wang ; Changyu Shen ; Yanfang Lu ; Debao Chen ; Chuan Zhong ; Jinlei Chu ; Xinyong Dong ; Chan, C.C.

Author_Institution

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

Volume

13

Issue

5

fYear

2013

fDate

May-13

Firstpage

1721

Lastpage

1724

Abstract

A liquid refractive index sensor based on a fiber loop mirror (FLM) combined with an etched polarization maintaining fiber (PMF) is proposed. As the etched section of the PMF is immersed in liquid with different refractive indices, the interference spectrum of the FLM presents high sensitivity to the surrounding-medium refractive index. High sensitivity of 25.29 nm/refractive index unit (RIU) and resolution of 7.91 × 10^-4 RIU are achieved for the proposed refractive index sensor. This sensor is also capable of simultaneous measurement of refractive index and temperature.

Keywords

fibre optic sensors; mirrors; refractive index; fiber loop mirror; interference spectrum; liquid refractive index sensor; polarization maintaining fiber; refractive indices; Interference; Optical fiber polarization; Optical fiber sensors; Refractive index; Sensitivity; Temperature measurement; Temperature sensors; Chemical etching; fiber loop mirror; polarization maintaining fiber; refractive index sensor;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2012.2231409

Filename

6374636