CA2479245C - Methode et dispositif produisant de la lumiere depolarisee - Google Patents

Methode et dispositif produisant de la lumiere depolarisee Download PDF

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Publication number
CA2479245C
CA2479245C CA002479245A CA2479245A CA2479245C CA 2479245 C CA2479245 C CA 2479245C CA 002479245 A CA002479245 A CA 002479245A CA 2479245 A CA2479245 A CA 2479245A CA 2479245 C CA2479245 C CA 2479245C
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CA
Canada
Prior art keywords
polarization
light
output
sensor
fiber
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.)
Expired - Lifetime
Application number
CA002479245A
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English (en)
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CA2479245A1 (fr
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
Optoplan AS
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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 Optoplan AS filed Critical Optoplan AS
Publication of CA2479245A1 publication Critical patent/CA2479245A1/fr
Application granted granted Critical
Publication of CA2479245C publication Critical patent/CA2479245C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Méthode et dispositif produisant de la lumière dépolarisée qui est utile pour former des signaux d'interrogation pour un réseau de capteurs optiques et un démodulateur présentant un évanouissement induit par une polarisation réduite et un bruit de phase. La lumière dépolarisée est produite en divisant un faisceau de lumière, en retardant une première composante orthogonale du faisceau lumineux par rapport à une seconde composante orthogonale du faisceau de lumière au moyen d'un retard prédéfini, tout en maintenant la polarisation de la première composante orthogonale et la polarisation de la deuxième composante orthogonale. Les faisceaux de lumière retardés sont combinés pour produire un faisceau de lumière dépolarisé en sélectionnant un retard prédéfini qui entraîne un signal d'interférence présentant un retard égal au retard prédéfini à être supprimé pendant un processus de démodulation.
CA002479245A 2003-08-27 2004-08-25 Methode et dispositif produisant de la lumiere depolarisee Expired - Lifetime CA2479245C (fr)

Applications Claiming Priority (4)

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

Publications (2)

Publication Number Publication Date
CA2479245A1 CA2479245A1 (fr) 2005-02-27
CA2479245C true CA2479245C (fr) 2010-01-12

Family

ID=33135364

Family Applications (3)

Application Number Title Priority Date Filing Date
CA2639131A Expired - Lifetime CA2639131C (fr) 2003-08-27 2004-08-25 Methode et dispositif assurant le traitement des signaux insensibles a la polarisation pour capteurs interferometriques
CA002479245A Expired - Lifetime CA2479245C (fr) 2003-08-27 2004-08-25 Methode et dispositif produisant de la lumiere depolarisee
CA002479081A Expired - Lifetime CA2479081C (fr) 2003-08-27 2004-08-25 Methode et dispositif assurant le traitement des signaux insensibles a la polarisation pour capteurs interferometriques

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA2639131A Expired - Lifetime CA2639131C (fr) 2003-08-27 2004-08-25 Methode et dispositif assurant le traitement des signaux insensibles a la polarisation pour capteurs interferometriques

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002479081A Expired - Lifetime CA2479081C (fr) 2003-08-27 2004-08-25 Methode et dispositif assurant le traitement des signaux insensibles a la polarisation pour capteurs interferometriques

Country Status (2)

Country Link
CA (3) CA2639131C (fr)
GB (2) GB2405469B (fr)

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
WO2016086310A1 (fr) * 2014-12-04 2016-06-09 Hifi Engineering Inc. Interrogateur optique permettant de réaliser une interférométrie au moyen de réseaux de bragg sur fibre
GB2568305B (en) 2017-11-13 2022-06-15 Univ Cranfield A fibre optic sensing device
CN109631962B (zh) * 2018-12-20 2020-12-04 中国人民解放军国防科技大学 一种基于pgc方案的多频载波偏振调制解调系统及方法

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 (fr) * 1992-05-08 1997-10-29 Kokusai Denshin Denwa Co., Ltd Emetteur optique avec un signal lumineux de degré de polarisation réduit et circuit optique de dépolarisation
US6574015B1 (en) * 1998-05-19 2003-06-03 Seagate Technology Llc Optical depolarizer
NO322073B1 (no) * 1999-06-23 2006-08-07 Optoplan As Fremgangsmate for polarisasjonskontroll
CA2393172C (fr) * 2002-07-12 2008-11-04 Itf Technologies Optiques Inc.- Itf Optical Technologies Inc. Depolariseur tout en fibres de conception lineaire

Also Published As

Publication number Publication date
GB0419047D0 (en) 2004-09-29
CA2639131A1 (fr) 2005-02-27
CA2479245A1 (fr) 2005-02-27
GB2405469A (en) 2005-03-02
GB2406166B (en) 2006-07-05
GB0419163D0 (en) 2004-09-29
GB2405469B (en) 2006-11-29
CA2479081A1 (fr) 2005-02-27
GB2406166A (en) 2005-03-23
CA2639131C (fr) 2010-01-26
CA2479081C (fr) 2008-11-25

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