Code length limit in phase-sensitive OTDR using ultralong (>1M bits) pulse sequences due to fading induced by fiber optical path drifts
Autores
Fidalgo Martins, Hugo; Shi, K.; Thomsen, B.C.; Martín López, Sonia; González Herráez, Miguel; [et al.]Identificadores
Enlace permanente (URI): http://hdl.handle.net/10017/31059DOI: 10.1117/12.2263117
ISSN: 0277-786X
ISBN: 978-1-51061-091-0
Editor
Spie
Fecha de publicación
2017Fecha fin de embargo
2018-04-22Patrocinadores
European Commission
Ministerio de Economía y Competitividad
Comunidad de Madrid
Cita bibliográfica
Martins, H.F., Shi, K., Thomsen, B.C., Martín-López, S., González-Herráez, M. & Savory, S.J. 2017, "Code length limit in phase-sensitive OTDR using ultralong (>1M bits) pulse sequences due to fading induced by fiber optical path drifts", Proceedings of SPIE, vol. 10323, 25th International Conference on Optical Fiber Sensors, art. no. 103235W.
Palabras clave
Distributed vibration sensing
Dynamic strain sensing
I/Q detection
Phase-sensitive OTDR
Phase-shift keying
Pulse coding
Trace fading
Proyectos
info:eu-repo/grantAgreement/EC/FP7/307441/EU/Ubiquitous optical FIbre NErves/U-FINE
info:eu-repo/grantAgreement/EC/H2020/722509/EU/Fibre Nervous Sensing Systems/FINESSE
info:eu-repo/grantAgreement/EC/H2020/WaterJPI-JC-2015-04/EU/Dikes and Debris Flows Monitoring by Novel Optical Fiber Sensors/DOMINO
info:eu-repo/grantAgreement/MINECO//TEC2013-45265-R/ES/DETECCION TEMPRANA DE AMENAZAS PARA INFRAESTRUCTURAS CRITICAS USANDO SISTEMAS DISTRIBUIDOS DE FIBRA OPTICA/
info:eu-repo/grantAgreement/MINECO//TEC2015-71127-C2-2-R/ES/REDUCCION DE LOS EFECTOS DE RUIDO EN SISTEMAS DE FIBRA OPTICA NO LINEALES/
info:eu-repo/grantAgreement/CAM//S2009%2FMIT2790/ES/SENSORES E INSTRUMENTACION EN TECNOLOGIAS FOTONICAS/SINFOTON
info:eu-repo/grantAgreement/EC/FP7/608099/EU/Allied Initiative for Training and Education in Coherent Optical Networks/ICONE
Tipo de documento
info:eu-repo/semantics/conferenceObject
Versión
info:eu-repo/semantics/acceptedVersion
Versión del editor
http://dx.doi.org/10.1117/12.2263117Derechos
Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
© Society of Photo-Optical Instrumentation Engineers (SPIE), 2017
Derechos de acceso
info:eu-repo/semantics/openAccess
Resumen
Recently, it has been demonstrated that by recovering the amplitude and phase of the backscattered optical signal, a ΦOTDR using pulse coding can be treated as a fully linear system in terms of trace coding/decoding, thus allowing for the use of tens of thousands of bits with a dramatic improvement of the system performance. In this communication, as a continuation of previous work by the same authors, a preliminary study aiming at characterizing the limits of the system in terms of maximum usable code length is presented. Using a code exceeding 1million bits over a duration of 0.26ms, it is observed that fiber optical path variations exceeding π occurring over a time inferior to the pulse code length can lead to localized fading in the ΦOTDR trace. The occurrence, positions and form of the fading points along the ΦOTDR trace is observed to be strongly dependent on the type, frequency and amplitude of the perturbations applied to the fiber.
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