An Ultimately Fast Frequency-scanning Brillouin Optical Time Domain Analyzer

Sovran, Ido; Motil, Avi; Danon, Orr; Tur, Moshe

doi:10.1364/ofc.2015.w2a.44

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…In order to circumvent this limitation in the measurement time of BOTDA sensors several techniques have been proposed. For instance, the use of arbitrary waveform generation in conventional BOTDA setups to speed up the measurement process [4]. Also, the use of pump and probe waves containing multiple spectral components so that several frequencies within the Brillouin spectrum can be measured simultaneously [5][6].…”

Section: Dynamic Measurementsmentioning

confidence: 99%

Fiber-Optic Brillouin Distributed Sensors: From Dynamic to Long-Range Measurements

Loayssa¹,

Urrielqui²,

Iribas³

et al. 2018

Sensors for Diagnostics and Monitoring

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In this chapter, we introduce the current state of the art in beroptic distributed sensors based on the stimulated Brillouin scattering nonlinear eect. This type of sensors provides measurements of strain and temperature along every position of a standard singlemode ber, which can be applied to monitor the health of structures in civil, geotechnical, mechanical and aerospace engineering. We start by briey reviewing the fundamentals of the technology, focusing in its most mature version: the Brillouin optical-time domain analysis (BOTDA) sensor. The theoretical underpinnings of these sensors are discussed as well as the practical deployment of measurement setups. Then, we focus on discussing the current research trends in BOTDA sensors, particularly in two areas: dynamic sensing and long-range measurements. Dynamic BOTDA sensors are able to measure the strain distributed along a ber that is xed to a structure that is experiencing movement or vibration. This requires reducing the measurement time of the distributed sensor so that hundreds of measurements can be performed each second. We review the methods that have been demonstrated to achieve this performance and show some specic examples. The other research trend that we consider is the extension of the measurement range of the sensor. This is driven by applications such as oil and gas pipeline integrity monitoring or the measurement of temperature along high-voltage power lines, in which the distance to monitor can reach hundreds of kilometers. We discuss the fundamental limitations to enlarge the range of BOTDA sensors and describe the techniques that have been deployed to overcome these limitations in order to reach measurement distances over 100 km.1 This is an accepted manuscript of a book chapter published by CRC Press in Sensors for Diagnostics and Monitoring in 2018 available online: https://www.taylorfrancis.com/chapters/edit/10.1201/9781351250092-2/fiber-optic-brillouindistributed-sensors-dynamic-long-range-measurements-alayn-loayssa-javier-urrielqui-haritz-iribas-juan-jos%C3%A9-momp%C3%B3-jon-mari%C3%B1elarena

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Section: Dynamic Measurementsmentioning

confidence: 99%