NO20100026L - Distribuert avfoling i en optisk fiber ved bruk av Brillouin-spredning - Google Patents

Distribuert avfoling i en optisk fiber ved bruk av Brillouin-spredning

Info

Publication number
NO20100026L
NO20100026L NO20100026A NO20100026A NO20100026L NO 20100026 L NO20100026 L NO 20100026L NO 20100026 A NO20100026 A NO 20100026A NO 20100026 A NO20100026 A NO 20100026A NO 20100026 L NO20100026 L NO 20100026L
Authority
NO
Norway
Prior art keywords
frequency
light
optical fiber
stokes
transmitted
Prior art date
Application number
NO20100026A
Other languages
English (en)
Other versions
NO340934B1 (no
Inventor
Arthur H Hartog
Gareth P Lees
Original Assignee
Bp Exploration Operating
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bp Exploration Operating filed Critical Bp Exploration Operating
Publication of NO20100026L publication Critical patent/NO20100026L/no
Publication of NO340934B1 publication Critical patent/NO340934B1/no

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
    • G01D5/35354—Sensor working in reflection
    • G01D5/35358—Sensor working in reflection using backscattering to detect the measured quantity
    • G01D5/35364—Sensor working in reflection using backscattering to detect the measured quantity using inelastic backscattering to detect the measured quantity, e.g. using Brillouin or Raman backscattering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/44—Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
    • G01J3/4412—Scattering spectrometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)
  • Lasers (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

For å utføre distribuert avføling med en optisk fiber ved å benytte Brillouin- spredning, transmitteres en lyspuls inn i den optiske fiberen, hvor den transmitterte lyspulsen har en første frekvens. Tilbakespredt lys og optisk lokal oscillatorlys kombineres, hvor det tilbakespredte lyset mottas fra den optiske fiberen som svar på den transmitterte lyspulsen, og hvor det optiske lokale oscillatorlyset har en andre frekvens. En frekvensforskyvning forårsakes å være tilstede mellom den første frekvensen av den transmitterte lyspulsen og den andre frekvensen av det optisk lokale oscillatorlyset, hvor frekvensforskyvningen er minst l GHz mindre enn en Brillouin- frekvensforskyvning av det tilbakespredte lyset. Spektra som representerer Stokes- og anti-Stokes-komponenter av det tilbakespredte lyset er påkrevet, hvor Stokes- og anti-Stokes-komponentene er separert med et frekvensspenn som er basert på frekvensforskyvningen.
NO20100026A 2007-07-03 2010-01-08 Distribuert avføling i en optisk fiber ved bruk av Brillouin-spredning NO340934B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/772,997 US7504618B2 (en) 2007-07-03 2007-07-03 Distributed sensing in an optical fiber using brillouin scattering
PCT/US2008/066871 WO2009006000A2 (en) 2007-07-03 2008-06-13 Distributed sensing in an optical fiber using brillouin scattering

Publications (2)

Publication Number Publication Date
NO20100026L true NO20100026L (no) 2010-03-26
NO340934B1 NO340934B1 (no) 2017-07-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
NO20100026A NO340934B1 (no) 2007-07-03 2010-01-08 Distribuert avføling i en optisk fiber ved bruk av Brillouin-spredning

Country Status (5)

Country Link
US (1) US7504618B2 (no)
CA (1) CA2692151A1 (no)
GB (1) GB2464414B (no)
NO (1) NO340934B1 (no)
WO (1) WO2009006000A2 (no)

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Also Published As

Publication number Publication date
GB2464414A (en) 2010-04-21
NO340934B1 (no) 2017-07-17
GB201000099D0 (en) 2010-02-17
US20090008536A1 (en) 2009-01-08
WO2009006000A3 (en) 2010-01-14
WO2009006000A2 (en) 2009-01-08
CA2692151A1 (en) 2009-01-08
GB2464414B (en) 2011-11-09
US7504618B2 (en) 2009-03-17

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