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Sensors 2012, 12(3), 3438-3448; doi:10.3390/s120303438

Amplified OTDR Systems for Multipoint Corrosion Monitoring

Polytechnic School of Pernambuco, University of Pernambuco (UPE), 52720-001, Recife, PE, Brazil
Department of Electronics and Systems, Federal University of Pernambuco (UFPE), 50740-550, Recife, PE, Brazil
Department of Electrical Engineering, Federal University of São Francisco Valley (UNIVASF), 56305-971, Petrolina, PE, Brazil
Author to whom correspondence should be addressed.
Received: 17 January 2012 / Revised: 28 February 2012 / Accepted: 7 March 2012 / Published: 12 March 2012
(This article belongs to the Special Issue Optical Fiber Sensors 2012)
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We present two configurations of an amplified fiber-optic-based corrosion sensor using the optical time domain reflectometry (OTDR) technique as the interrogation method. The sensor system is multipoint, self-referenced, has no moving parts and can measure the corrosion rate several kilometers away from the OTDR equipment. The first OTDR monitoring system employs a remotely pumped in-line EDFA and it is used to evaluate the increase in system reach compared to a non-amplified configuration. The other amplified monitoring system uses an EDFA in booster configuration and we perform corrosion measurements and evaluations of system sensitivity to amplifier gain variations. Our experimental results obtained under controlled laboratory conditions show the advantages of the amplified system in terms of longer system reach with better spatial resolution, and also that the corrosion measurements obtained from our system are not sensitive to 3 dB gain variations. View Full-Text
Keywords: corrosion; optical fiber; OTDR; fiber sensor; optical amplifier; EDFA corrosion; optical fiber; OTDR; fiber sensor; optical amplifier; EDFA

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Nascimento, J.F.; Silva, M.J.; Coêlho, I.J.S.; Cipriano, E.; Martins-Filho, J.F. Amplified OTDR Systems for Multipoint Corrosion Monitoring. Sensors 2012, 12, 3438-3448.

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