CA2479081A1 - Method and apparatus for providing polarization insensitive signal processing for interferometric sensors - Google Patents

Method and apparatus for providing polarization insensitive signal processing for interferometric sensors Download PDF

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Publication number
CA2479081A1
CA2479081A1 CA 2479081 CA2479081A CA2479081A1 CA 2479081 A1 CA2479081 A1 CA 2479081A1 CA 2479081 CA2479081 CA 2479081 CA 2479081 A CA2479081 A CA 2479081A CA 2479081 A1 CA2479081 A1 CA 2479081A1
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CA
Canada
Prior art keywords
signal processing
polarization insensitive
interferometric sensors
providing polarization
insensitive signal
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA 2479081
Other languages
French (fr)
Other versions
CA2479081C (en
Inventor
Ole Henrik Waagaard
Erlend Ronnekleiv
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Submarine Networks Norway AS
Original Assignee
Weatherford Lamb Inc
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
Priority claimed from US10/650,117 external-priority patent/US7081959B2/en
Priority claimed from US10/649,590 external-priority patent/US7088878B2/en
Application filed by Weatherford Lamb Inc filed Critical Weatherford Lamb Inc
Priority to CA2639131A priority Critical patent/CA2639131C/en
Publication of CA2479081A1 publication Critical patent/CA2479081A1/en
Application granted granted Critical
Publication of CA2479081C publication Critical patent/CA2479081C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G01D5/344—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 using polarisation
    • G01D5/345—Polarising encoders
    • 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
    • G01D5/35303—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 a reference fibre, e.g. interferometric devices
    • 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
    • G01D5/35383—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 multiple sensor devices using multiplexing techniques

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Communication System (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Transform (AREA)

Abstract

A method and apparatus that uses specific source modulation and detectors t o detect a response that carries information about a system response matrix associated with each sensor in a interterometric sensor array and extracting a sensor response in a manner that eliminates polarisation-induced signal fadi ng and that is insensitive to lead fiber birefringence fluctuations.
CA002479081A 2003-08-27 2004-08-25 Method and apparatus for providing polarization insensitive signal processing for interferometric sensors Active CA2479081C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2639131A CA2639131C (en) 2003-08-27 2004-08-25 Method and apparatus for providing polarization insensitive signal processing for interferometric sensors

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10/650,117 US7081959B2 (en) 2003-08-27 2003-08-27 Method and apparatus for providing polarization insensitive signal processing for interferometric sensors
US10/650,117 2003-08-27
US10/649,590 US7088878B2 (en) 2003-08-27 2003-08-27 Method and apparatus for producing depolarized light
US10/649,590 2003-08-27

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2639131A Division CA2639131C (en) 2003-08-27 2004-08-25 Method and apparatus for providing polarization insensitive signal processing for interferometric sensors

Publications (2)

Publication Number Publication Date
CA2479081A1 true CA2479081A1 (en) 2005-02-27
CA2479081C CA2479081C (en) 2008-11-25

Family

ID=33135364

Family Applications (3)

Application Number Title Priority Date Filing Date
CA002479245A Active CA2479245C (en) 2003-08-27 2004-08-25 Method and apparatus for producing depolarized light
CA2639131A Active CA2639131C (en) 2003-08-27 2004-08-25 Method and apparatus for providing polarization insensitive signal processing for interferometric sensors
CA002479081A Active CA2479081C (en) 2003-08-27 2004-08-25 Method and apparatus for providing polarization insensitive signal processing for interferometric sensors

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA002479245A Active CA2479245C (en) 2003-08-27 2004-08-25 Method and apparatus for producing depolarized light
CA2639131A Active CA2639131C (en) 2003-08-27 2004-08-25 Method and apparatus for providing polarization insensitive signal processing for interferometric sensors

Country Status (2)

Country Link
CA (3) CA2479245C (en)
GB (2) GB2405469B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7466425B2 (en) * 2005-04-22 2008-12-16 Agilent Technologies, Inc. Elementary matrix based optical signal/network analyzer
US10247581B2 (en) 2014-04-28 2019-04-02 Optoplan As Interferometric optical fibre sensor system and method of interrogation
US10416005B2 (en) 2014-12-04 2019-09-17 Hifi Engineering Inc. Optical interrogator for performing interferometry using fiber Bragg gratings
GB2568305B (en) * 2017-11-13 2022-06-15 Univ Cranfield A fibre optic sensing device
CN109631962B (en) * 2018-12-20 2020-12-04 中国人民解放军国防科技大学 Multi-frequency carrier polarization modulation and demodulation system and method based on PGC scheme

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5173743A (en) * 1991-05-28 1992-12-22 Litton Systems, Inc. Fiber optical time-division-multiplexed unbalanced pulsed interferometer with polarization fading compensation
EP0570151B1 (en) * 1992-05-08 1997-10-29 Kokusai Denshin Denwa Co., Ltd Optical transmitter with the signal light of reduced degree of polarization and optical depolarizing circuit
US6574015B1 (en) * 1998-05-19 2003-06-03 Seagate Technology Llc Optical depolarizer
NO322073B1 (en) * 1999-06-23 2006-08-07 Optoplan As Polarization Control Procedure
CA2393172C (en) * 2002-07-12 2008-11-04 Itf Technologies Optiques Inc.- Itf Optical Technologies Inc. All-fiber linear design depolarizer

Also Published As

Publication number Publication date
GB2405469A (en) 2005-03-02
CA2639131A1 (en) 2005-02-27
GB2406166A (en) 2005-03-23
CA2479081C (en) 2008-11-25
GB0419163D0 (en) 2004-09-29
GB2405469B (en) 2006-11-29
CA2479245C (en) 2010-01-12
CA2639131C (en) 2010-01-26
GB2406166B (en) 2006-07-05
CA2479245A1 (en) 2005-02-27
GB0419047D0 (en) 2004-09-29

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