Open AccessJournal Article10.1049/EL:20070990

Distributed temperature sensor system based on raman scattering using correlation-codes

- 02 Aug 2007

- Vol. 43, Iss: 16, pp 862-864

TL;DR: A distributed sensor system employing spontaneous Raman scattering with use of correlation-coding techniques and a single-detector scheme is discussed and experimentally characterised.

Abstract: A distributed sensor system employing spontaneous Raman scattering with use of correlation-coding techniques and a single-detector scheme is discussed and experimentally characterised. A sensing distance of up to 8 km is achieved with high spatial and temperature resolutions; use of correlation-coding significantly reduces measurement time and allows use of low-power laser sources.

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Introduction: Fibre-based distributed temperature sensor ( DTS ) systems have been intensively studied for several years, because of the advantages they can provide compared to conventional sensors, and to optical fibre multiplexed sensor systems ( such as grating-based sensors ) ; most common applications include pipeline monitoring ( for oil and gas transportation ), oil well monitoring and power cables as well as fire detection systems [ 1 ].

Fig. 3 Root mean square temperature resolution (and exponential fit) against fibre length for 4 and 8 km sensing distance (measurement time of 1 and 10 min)

Fig. 2 Temperature distribution with 100 m MMF placed at different temperatures

Fig. 1 Schematic of DTS, transmitter and single-photodiode receiver (Fig. 1a); details of single-photodiode receiver block (Fig. 1b); setup of different sensing fibre schemes used in experiments (Fig. 1c)

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References

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Optical fiber sensor technology : advanced applications-bragg gratings and distributed sensors

K. T. V. Grattan, +1 more

- 01 Jan 2000

TL;DR: In this article, Hartog and Othonos discuss the relationship between nonlinear optical fiber and distributed fiber optic sensors and their application in the field of optical fiber chemical sensors.

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Journal Article•10.1049/EL:19900046

Complementary correlation OTDR with three codewords

Moshe Nazarathy, +2 more

- 04 Jan 1990

- Electronics Letters

TL;DR: A complementary correlation OTDR technique based on probing with only three codewords and processing with onlyThree correlations is presented, for any power of two code length.

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•Proceedings Article•10.1364/OFS.2006.THE45

Improved Performance in Raman-based Distributed Temperature Sensing with coded OTDR and Discrete Raman Amplification

Gabriele Bolognini, +4 more

- 23 Oct 2006

TL;DR: Using 255-bit Simplex-coded OTDR, this article demonstrated enhanced performance in Raman-based DTS (30km with 5K and 17m resolution) using low-power (80 mW) laser-diodes.

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Journal Article•10.1109/50.779159

Spontaneous Raman scattering in optical fibers with modulated probe light for distributed temperature Raman remote sensing

M.A. Farahani, +1 more

- 01 Aug 1999

- Journal of Lightwave Technology

TL;DR: In this paper, a proper sensor element and wavelength for fiber-optic Raman sensing is determined for sinusoidally intensity-modulated probe light, and the temperature error for long sensor fibers is theoretically analyzed.

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Distributed temperature sensor system based on raman scattering using correlation-codes

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Citations

A review of ground investigations for ground source heat pump (GSHP) systems

Raman-based distributed temperature sensor with 1 m spatial resolution over 26 km SMF using low-repetition-rate cyclic pulse coding

Genetic-optimised aperiodic code for distributed optical fibre sensors.

Sapphire-fiber-based distributed high-temperature sensing system.

Enhanced Backscattering Optical Fiber Distributed Sensors: Tutorial and Review

References

Optical fiber sensor technology : advanced applications-bragg gratings and distributed sensors

Complementary correlation OTDR with three codewords

Improved Performance in Raman-based Distributed Temperature Sensing with coded OTDR and Discrete Raman Amplification

Spontaneous Raman scattering in optical fibers with modulated probe light for distributed temperature Raman remote sensing

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