Development of a distributed sensing technique using Brillouin scattering

Horiguchi, T.; Shimizu, Kazuo; Kurashima, Toshio; Tateda, Mitsuhiro; Koyamada, Yahei

doi:10.1109/50.400684

Cited by 660 publications

(365 citation statements)

References 29 publications

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“…The result is that the detected spectrum has a linewidth S which is larger than the inherent linewidth of the SpBS. The rms noise (δν B ) in the BFS depends ultimately on the electrical SNR in the SpBS spectrum and on the spectrum linewidth itself ( S), according to [11] …”

Section: Resultsmentioning

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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Section: Resultsmentioning

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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“…The maximum amplification occurs when the frequency offset between the two optical waves equals the peak acoustic-phonon frequency. This frequency is called the Brillouin frequency shift (BFS) and depends linearly on strain and temperature [1], providing an effective mechanism to perform the distributed sensing of these physical quantities along an optical fiber. Thus, the BFS change ( ν B ) along the fiber can be expressed as a linear combination of temperature variation ( T) and strain variation ( ε), as follows:…”

Section: Theorymentioning

confidence: 99%

“…In BOTDA sensors, a single-mode optical fiber is used as a distributed amplifier, where a pump wave transfers part of its energy to a counter-propagating probe signal through the interaction with acoustic phonons [1][2][3]. The probepump interaction actually creates a periodic perturbation of the refractive index of the fiber, thus reflecting part of the pump signal by Bragg diffraction and reinforcing the acoustic wave.…”

Section: Theorymentioning

confidence: 99%

“…Fiber optic sensors based on stimulated Brillouin scattering (SBS) have attracted a great deal of attention in recent years, thanks to their unparalleled ability to continuously measure a physical variable of interest, such as strain or temperature, along an optical fiber [1,2]. The typical detection technique used in SBS-based sensors refers to the so-called Brillouin optical time-domain analysis (BOTDA) technique [1,3], which is based on the use of an optical pulse acting as a pump signal and a counter-propagating continuous-wave (CW) probe beam.…”

Section: Introductionmentioning

confidence: 99%

“…The typical detection technique used in SBS-based sensors refers to the so-called Brillouin optical time-domain analysis (BOTDA) technique [1,3], which is based on the use of an optical pulse acting as a pump signal and a counter-propagating continuous-wave (CW) probe beam. Thus, by measuring variations of the Brillouin gain spectrum (BGS) [4] along an optical fiber, distributed strain and temperature measurements can be carried out.…”

Section: Introductionmentioning

confidence: 99%

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Long-range Brillouin optical time-domain analysis sensor employing pulse coding techniques

Soto¹,

Bolognini²,

Pasquale³

et al. 2010

Meas. Sci. Technol.

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In this paper we describe and implement a long-range Brillouin optical time-domain analysis (BOTDA) sensor, for both temperature and strain measurements, using optical pulse coding techniques. A theoretical analysis of Simplex coding applied to BOTDA systems is presented and experimentally demonstrated for both Brillouin loss and Brillouin gain configurations. With the proposed technique, ∼7.1 dB and ∼10.3 dB of signal-to-noise ratio improvements are demonstrated in BOTDA measurements using 127-bit and 511-bit Simplex codes, respectively. This feature allows us to extend the dynamic range of the measurements, overcoming the limitations to the maximum usable optical power imposed by pump depletion and modulation instability; thus, the sensing range can be extended by several tens of kilometers while keeping meter-scale spatial resolution. Experimental results show the capabilities of optical pulse coding techniques to achieve 1 m spatial resolution over 50 km of standard single-mode fiber enabling temperature and strain resolutions equal to 2.2 • C and 44 με, respectively.

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