Title :
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
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;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2012.2231409
