A fully distributed simultaneous strain and temperature sensor using spontaneous Brillouin backscatter

Parker, Tom; Farhadiroushan, M.; Handerek, V.A.; Roger, A.J.

doi:10.1109/68.593372

Cited by 145 publications

(71 citation statements)

References 4 publications

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“…For the SMF case, the measured coefficient values agreed closely with previously reported results [2,5]. Laser Source Figure 2: Brillouin spectrum in SMF and LEAF.…”

Section: Resultssupporting

confidence: 81%

Comparison between standard SMF and nonzero dispersion shifted fibre LEAF for long range simultaneous temperature and strain measurements

2004

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“…For the SMF case, the measured coefficient values agreed closely with previously reported results [2,5]. Laser Source Figure 2: Brillouin spectrum in SMF and LEAF.…”

Section: Resultssupporting

confidence: 81%

Comparison between standard SMF and nonzero dispersion shifted fibre LEAF for long range simultaneous temperature and strain measurements

2004

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“…2,3 Measurements of both the frequency shift of inelastically scattered photons and the linewidth of the resulting Brillouin peaks provide unique information regarding mechanical properties of materials, such as strain, temperature, stiffness, and elasticity constants. [4][5][6][7][8] More recently, Brillouin spectroscopy has been extended from a point sampling technique into an imaging modality, 9 heralding potential applications in cellular imaging and in-vivo diagnostics.…”

Section: Spectral Broadening In Brillouin Imagingmentioning

confidence: 99%

Spectral broadening in Brillouin imaging

Antonacci

Foreman

Paterson

et al. 2013

Applied Physics Letters

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Brillouin microscopy is an emerging imaging modality that provides fundamental information about mechanical properties of media in a non-contact manner. To date, low numerical aperture (NA) optics have been used, due to noticeable angular broadening of the Brillouin spectrum at higher NAs. In this work, we investigate theoretically and experimentally the dependence of spectral broadening effects in Brillouin imaging on system NA, for both 90 degrees and 180 degrees scattering geometries. Lineshape deformations and broadening are found to be minimised in a backscattering geometry, hence paving the way for high resolution in-vivo mechanical imaging. (C) 2013 AIP Publishing LLC

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“…In SpBS detection, fiber strain and temperature variations are inferred from measurements of BFS parameters. Changes in the distributed strain ( ε) at each point z along the fiber can then be estimated from the BFS measurement ( ν B ) related to that point, which linearly depends on both strain and temperature according to where C νBε = 0.048 MHz με −1 and C νBT = 1.07 MHz • C −1 are the strain and temperature coefficients for BFS [1]. The temperature variation T(z) in equation (3) is provided by equation (2), which is based on anti-Stokes Raman measurement, allowing for a temperature-independent strain estimation.…”

Section: Theorymentioning

confidence: 99%

“…Distributed sensing commonly requires simultaneous measurements of temperature and deformations along the optical fiber, currently achieved by using measurement techniques based either on optical Brillouin scattering [1] or on hybrid Raman-Brillouin scattering detection [2]. Such nonlinear effects are generally exploited in measurement systems based on the optical time domain reflectometry (OTDR) principle.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous distributed strain and temperature sensing based on combined Raman–Brillouin scattering using Fabry–Perot lasers

Bolognini¹,

Soto²,

Pasquale³

2010

Meas. Sci. Technol.

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An investigation is performed of the possibility of achieving simultaneous distributed strain and temperature sensing based on hybrid Raman-Brillouin scattering with the use of multi-wavelength optical sources such as common Fabry-Perot (FP) lasers. By employing a self-heterodyne detection scheme based on a multi-wavelength optical local oscillator, the benefits of FP lasers are fully exploited, allowing for high-power Raman intensity measurements and a simultaneous high-accuracy detection of the Brillouin frequency shift parameter for each FP longitudinal mode. Experimental results point out a significant reduction of coherent Rayleigh noise, and highlight the enhanced performance in hybrid Raman-Brillouin sensing when using FP lasers; in particular using standard FP lasers at 1550 nm results in about 12 dB (7 dB) temperature (strain) accuracy improvement at 25 km sensing distance with respect to the use of standard distributed feedback lasers.

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A fully distributed simultaneous strain and temperature sensor using spontaneous Brillouin backscatter

Cited by 145 publications

References 4 publications

Comparison between standard SMF and nonzero dispersion shifted fibre LEAF for long range simultaneous temperature and strain measurements

Comparison between standard SMF and nonzero dispersion shifted fibre LEAF for long range simultaneous temperature and strain measurements

Spectral broadening in Brillouin imaging

Simultaneous distributed strain and temperature sensing based on combined Raman–Brillouin scattering using Fabry–Perot lasers

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