A Fresnel reflection-based optical fiber sensor system for remote refractive index measurement using an OTDR

In this paper, we propose a Fresnel reflection-based optical fiber sensor system for remote refractive index measurement using the optical time domain reflectometry technique as an interrogation method. The surrounding refractive index from a long distance away can be measured easily by using this s...

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Bibliographic Details
Published in:Photonic sensors (Berlin) 2014-03, Vol.4 (1), p.48-52
Main Authors: Yuan, Jianying, Zhao, Chunliu, Ye, Manping, Kang, Juan, Zhang, Zaixuan, Jin, Shangzhong
Format: Article
Language:English
Subjects:
Lasers
Measurement Science and Instrumentation
Microwaves
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
RF and Optical Engineering
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Summary:In this paper, we propose a Fresnel reflection-based optical fiber sensor system for remote refractive index measurement using the optical time domain reflectometry technique as an interrogation method. The surrounding refractive index from a long distance away can be measured easily by using this sensor system, which operates based on testing the Fresnel reflection intensity from the fiber-sample interface. This system is a simple configuration, which is easy to handle. Experimental results showed that the range of this measurement could reach about 100.8 km, and the refractive index sensitivities were from 38.71 dB/RIU to 304.89 dB/RIU in the refractive index (RI) range from 1.3486 to 1.4525.
ISSN:1674-9251
2190-7439
DOI:10.1007/s13320-013-0131-6