Hybrid Brillouin-Rayleigh distributed sensing system

Kishida, Kinzo; Li, C. H.; Nishiguchi, Kimiyuki; Yamauchi, Yoshiaki; Guzik, Artur; Tsuda, Tsutomu

doi:10.1117/12.975668

Cited by 24 publications

(17 citation statements)

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“…Based on these assumptions, the coefficients C 11 and C 22 can be split into two components: C′ denote pure frequencytemperature coefficients for Brillouin and Rayleigh scattering, respectively, while is the thermal expansion coefficient of the structure. Inserting (4) and (5) into (1) and (3) gives the following expressions:…”

Section: Yamauchi's Methods [11]mentioning

confidence: 99%

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Study of optical fibers strain-temperature sensitivities using hybrid Brillouin-Rayleigh system

Kishida¹,

Yamauchi²,

Guzik³

2013

Photonic Sens

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In this paper, the most recent progress as well as challenges of distributed optical fiber sensing (DOFS) in industrial applications is discussed. Compared to the vast market of sensors used to measure strain or temperature, the success of distributed optical fiber sensing (DOFS) at the industrial level is very limited, at best. One of the reasons for this lack of the wider acceptance is the mismatch between the commercially available systems and actual industrial requirements, especially for the spatial resolution and precision. These requirements are organized and clarified in the paper. It also describes the hybrid Brillouin-Rayleigh system, which exhibits capabilities surpassing those of strain gauges. The principles of the system are illustrated considering the fiber calibration methodology. Formulas required for determining strain, temperature, and hydro-pressure are derived and discussed. Finally, the examples of applications are presented.

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Section: Yamauchi's Methods [11]mentioning

confidence: 99%

“…The actual separation is possible only if an additional, independent relation between strain, temperature and shift is available. The required relation can be provided by the frequency shift of time domain Rayleigh backscattering [5].…”

Section: Dtss Brillouin-based Sensingmentioning

confidence: 99%

Study of optical fibers strain-temperature sensitivities using hybrid Brillouin-Rayleigh system

Kishida¹,

Yamauchi²,

Guzik³

2013

Photonic Sens

Self Cite

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“…After a pair of BFS and RBSS has been measured along the sensing fiber, distributed temperature and strain information could be determined. It is worth mentioning that a hybrid Brillouin-Rayleigh system was reported recently [21], and the Rayleigh responses are measured by tunable wavelength coherent OTDR. The technique measures the jagged appearance of Rayleigh backscatter traces with a tunable narrow linewidth light source whose frequency is precisely controlled [22].…”

Section: Introductionmentioning

confidence: 99%

“…The spatial resolution is determined by the pulse width. However, the entire Rayleigh spectrum can be measured by obtaining a huge number of coherent OTDR traces over a large bandwidth (e.g., 5 THz) with small frequency step which is quite time consuming (a few of minutes to several hours) [21,22]. On the other hand, the OFDR technique measures complex Rayleigh backscatter patterns that makes it feasible for distributed temperature or strain measurement with very high spatial resolution.…”

Section: Introductionmentioning

confidence: 99%

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Distributed Temperature and Strain Discrimination with Stimulated Brillouin Scattering and Rayleigh Backscatter in an Optical Fiber

Zhou

Chen

et al. 2013

Sensors

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A distributed optical fiber sensor with the capability of simultaneously measuring temperature and strain is proposed using a large effective area non-zero dispersion shifted fiber (LEAF) with sub-meter spatial resolution. The Brillouin frequency shift is measured using Brillouin optical time-domain analysis (BOTDA) with differential pulse-width pair technique, while the spectrum shift of the Rayleigh backscatter is measured using optical frequency-domain reflectometry (OFDR). These shifts are the functions of both temperature and strain, and can be used as two independent parameters for the discrimination of temperature and strain. A 92 m measurable range with the spatial resolution of 50 cm is demonstrated experimentally, and accuracies of ±1.2 °C in temperature and ±15 με in strain could be achieved.

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