Proposal of Brillouin optical frequency-domain reflectometry (BOFDR)

Minardo, Aldo; Bernini, Romeo; Ruiz-Lombera, Rubén; Mirapeix, J.; López‐Higuera, J. M.; Zeni, Luigi

doi:10.1364/oe.24.029994

Cited by 88 publications

(47 citation statements)

References 14 publications

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“…Reflectometer Brillouin optical time domain reflectometer (BOTDR) [18,19] Brillouin optical frequency domain reflectometry (BOFDR) [20] Brillouin optical correlation domain reflectometry (BOCDR) [6,21] Analysis Brillouin optical time domain analysis (BOTDA) [22,23] Brillouin optical frequency domain analysis (BOFDA) [24,25] Brillouin optical correlation domain analysis (BOCDA) [6,26] In this paper, we mainly focus on the BOTDA scheme. By analyzing the limiting factors of the measurement speed for classical BOTDA scheme, several improved BOTDA schemes proposed in recent years are summarized for distributed dynamic measurements.…”

Section: Time-domain Frequency-domain Correlation-domainmentioning

confidence: 99%

Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing

et al. 2018

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Brillouin-based optical fiber sensing has been regarded as a good distributed measurement tool for the modern large geometrical structure and the industrial facilities because it can demodulate the distributed environment information (e.g., temperature and strain) along the sensing fiber. Brillouin optical time domain analysis (BOTDA), which is an excellent and attractive scheme, has been widely developed thanks to its high performance in a signal-to-noise ratio, a spatial resolution, and sensing distance. However, the sampling rate of the classical BOTDA is severely limited by several factors (especially the serially frequency-sweeping process) so that it cannot be suitable for the quickly distributed measurement. In this work, we summarize some promising breakthroughs about the fast BOTDA, which can be named as an optical frequency comb technique, an optical frequency-agile technique, a slope-assisted technique, and an optical chirp chain technique.

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Section: Time-domain Frequency-domain Correlation-domainmentioning

confidence: 99%

Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing

et al. 2018

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“…Brillouin backscattering is sensitive to both the temperature and strain, attributed to a linear relationship of the Brillouin frequency shift (BFS) versus the temperature and strain change [9,10]. Various types of Brillouin-based sensors were developed since the 1990s for both temperature and strain measurement, such as the Brillouin optical time domain analysis (BOTDA) [11] and reflectometer (BOTDR) [12], Brillouin optical frequency domain analysis (BOFDA) [13] and reflectometer (BOFDR) [14], Brillouin optical correlation domain analysis (BOCDA) [15] and reflectometer (BOCDR) [16], and Brillouin dynamic grating distributed sensing [17,18].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Brillouin Optical Time Domain Reflectometry

Bai

Wang

et al. 2019

Sensors

100

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In the past two decades Brillouin-based sensors have emerged as a newly-developed optical fiber sensing technology for distributed temperature and strain measurements. Among these, the Brillouin optical time domain reflectometer (BOTDR) has attracted more and more research attention, because of its exclusive advantages, including single-end access, simple system architecture, easy implementation and widespread field applications. It is realized mainly by injecting optical pulses into the fiber and detecting the Brillouin frequency shift (BFS), which is linearly related to the change of ambient temperature and axial strain of the sensing fiber. In this paper, the authors provide a review of new progress on performance improvement and applications of BOTDR in the last decade. Firstly, the recent advances in improving the performance of BOTDRs are summarized, such as spatial resolution, signal-to-noise ratio and measurement accuracy, measurement speed, cross sensitivity and other properties. Moreover, novel-type optical fibers bring new characteristics to optic fiber sensors, hence we introduce the different Brillouin sensing features of special fibers, mainly covering the plastic optical fiber, photonic crystal fiber, few-mode fiber and other special fibers. Additionally, we present a brief overview of BOTDR application scenarios in many industrial fields and intelligent perception, including structural health monitoring of large-range infrastructure, geological disaster prewarning and other applications. To conclude, we discuss several challenges and prospects in the future development of BOTDRs.

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“…Distributed strain and temperature sensing based on Brillouin scattering 1 in optical fibers has been one of the major targets of research in the community of smart materials and structures. Various configurations have been reported thus far, including Brillouin optical time-domain analysis (BOTDA) 2 – 7 , Brillouin optical frequency-domain analysis (BOFDA) 8 , 9 , Brillouin optical correlation-domain analysis (BOCDA) 10 – 15 , Brillouin optical time-domain reflectometry (BOTDR) 16 – 20 , Brillouin optical frequency-domain reflectometry (BOFDR) 21 , and Brillouin optical correlation-domain reflectometry (BOCDR) 22 – 30 . Each configuration has different merits and demerits; for instance, the time-domain techniques generally have long measurement ranges, but their spatial resolutions are limited to sub-meter order 31 , though some recent papers have reported significantly enhanced resolutions 32 , 33 .…”

Section: Introductionmentioning

confidence: 99%

Bending-loss-independent operation of slope-assisted Brillouin optical correlation-domain reflectometry

Lee

Mizuno

2018

Sci Rep

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We demonstrate loss-insensitive operation of slope-assisted Brillouin optical correlation-domain reflectometry by employing a special silica fiber with low bending loss. As fundamental characterization, we measure the coefficients of the power-change dependencies on strain and temperature to be 1.42 × 10−4 dB/µε and 3.28 × 10−3 dB/K, respectively. Subsequently, by comparing the distributed strain and temperature measurement results using a standard silica fiber and the special fiber, we show that this configuration offers highly stable loss-insensitive operation for practical use in the future.

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Proposal of Brillouin optical frequency-domain reflectometry (BOFDR)

Cited by 88 publications

References 14 publications

Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing

Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing

Recent Advances in Brillouin Optical Time Domain Reflectometry

Bending-loss-independent operation of slope-assisted Brillouin optical correlation-domain reflectometry

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