Comparison of the use of first and second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer in distributed vibration sensing over 125 km

H. F. Martins; S. Martin-Lopez; M. L. Filograno; P. Corredera; O. Frazao; M. Gonzalez-Herraez

doi:10.1117/12.2059483

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Comparison of the use of first and second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer in distributed vibration sensing over 125 km

H. F. Martins, S. Martin-Lopez, M. L. Filograno, P. Corredera, O. Frazao and M. Gonzalez-Herraez

23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS, Vol.9157, pp.91576K-91576K-4

Proceedings of SPIE

01/01/2014

DOI: https://doi.org/10.1117/12.2059483

Abstract

Optics

Physical Sciences

Physics

Physics, Applied

Science & Technology

We report on the use of second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer (phi OTDR) used for vibration measurements over very long distances. The sensor was able to measure vibrations of up to 380 Hz (limit set by the time of flight of light pulses) in a distance of 125 km with a resolution of 10 m and no post-processing. Balanced detection is used to reduce the relative intensity noise. A comparison with a sensor using first-order Raman amplification under similar conditions is presented and a clear improvement of performance is demonstrated.

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Title: Comparison of the use of first and second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer in distributed vibration sensing over 125 km
Creators - without role: H. F. Martins - Institute for Systems and Computer Engineering of Porto
S. Martin-Lopez - Universidad de Alcalá
M. L. Filograno - Inst Opt, CSIC C, Madrid 28006, Spain
P. Corredera - Inst Opt, CSIC C, Madrid 28006, Spain
O. Frazao - Institute for Systems and Computer Engineering of Porto
M. Gonzalez-Herraez - Universidad de Alcalá
Contributors - without role: J M LopezHiguera
J Jones
M LopezAmo
J L Santos
Publication Details: 23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS, Vol.9157, pp.91576K-91576K-4
Series: Proceedings of SPIE
Publisher: Spie-Int Soc Optical Engineering
Number of pages: 4
Grant note: INTERREG SUDOE program SFRH / BD / 76991 /2011 / Portuguese Fundacao para a Ciencia e Tecnologia (FCT); Fundacao para a Ciencia e a Tecnologia (FCT) 307441 / European Research Council; European Research Council (ERC); European Commission TEC2012-37958-0O2-01; TEC2012-37958CO2-02 / Spanish "Plan Nacional de I+D+i"; Spanish Government Comunidad de Madrid SFRH/BD/76991/2011 / Fundao para a Cincia e a Tecnologia Spanish Ministry of Science and Innovation t
Identifiers: 9932951408331
Academic Unit: University of Jeddah
Language: English
Resource Type: Conference proceeding