Long-range (>100km) distributed vibration sensor based on F-OTDR technique with spread amplification and detection of probe pulses

Sanahuja, David (Universidad de Zaragoza) ; Preciado, Javier ; Subías, Jesús (Universidad de Zaragoza) ; Heras, Carlos (Universidad de Zaragoza) ; Hidalgo, Lucía (Universidad de Zaragoza) ; Salinas, Iñigo (Universidad de Zaragoza) ; Sevillano, Pascual (Universidad de Zaragoza) ; Martínez, Juan ; Villafranca, Asier

Resumen: This paper presents a set of results to demonstrate a long-range (>100km) distributed vibration sensor (DAS) based on the Coherent Optical Time Domain Reflectometry (Φ-OTDR) technique using distributed amplification of the probe pulses and detection of the backscattered traces, which demonstrates great capability to achieve long-range distances with great sensitivity. In this case, optical amplifiers have been placed along the sensing optical fiber, each one followed by a detection stage. Results for some traces detected in each of the spans along the sensing fiber, and some measurements of stimuli produced by a vibration at the end of each of the sections of the sensing fiber, are showed here. This work, framed in the project SACOH (Long-range Distributed Vibration Sensing by Coherent Rayleigh Backscattering), has been carried out in collaboration between the University of Zaragoza and the company APL (Aragón Photonics Labs).

Idioma: Inglés

DOI: 10.5220/0007386401960200

Año: 2019

Publicado en: Photoptics (Setúbal) 7, 1 (2019), 196-200
ISSN: 2184-352X

Financiación: info:eu-repo/grantAgreement/ES/MINECO/RTC-2016-5212-8

Tipo y forma: Congress (Published version)

Área (Departamento): Área Física Aplicada (Dpto. Física Aplicada)
Área (Departamento): Área Teoría Señal y Comunicac. (Dpto. Ingeniería Electrón.Com.)