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A Dual-Wavelength Scheme for Brillouin Temperature Sensing in Optically Heated Co2+-Doped Fibers

A Dual-Wavelength Scheme for Brillouin Temperature Sensing in Optically Heated Co2+-Doped Fibers

Authors :
Agnese Coscetta
Aldo Minardo
Luigi Zeni
Ester Catalano
Enis Cerri
Source :
IEEE Sensors Journal. 20:1349-1354
Publication Year :
2020
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 2020.

Abstract

In this paper, we propose the use of a dual wavelength scheme for active distributed temperature sensing based on Co2+-doped fibers. A Brillouin Optical Frequency-Domain Analysis (BOFDA) set-up, operating at 850 nm, is used to detect the temperature changes along Co2+-doped optical fibers with various absorption coefficients, while optical heating is performed through a 1550-nm optical pump. A simple model describing optical heating along the Co2+-doped fiber is introduced and experimentally validated. As a proof of concept, we demonstrate that the sensor is capable to distinguish a 1-m portion of fiber immersed into water, from a section of equal length surrounded by air.

Details

ISSN :
23799153 and 1530437X
Volume :
20
Database :
OpenAIRE
Journal :
IEEE Sensors Journal
Accession number :
edsair.doi...........c9220a117c519162c5275af51b3a23d9
Full Text :
https://doi.org/10.1109/jsen.2019.2948298