GB0419163D0 - Method and apparatus for producing depolarized light - Google Patents

Method and apparatus for producing depolarized light

Info

Publication number
GB0419163D0
GB0419163D0 GB0419163A GB0419163A GB0419163D0 GB 0419163 D0 GB0419163 D0 GB 0419163D0 GB 0419163 A GB0419163 A GB 0419163A GB 0419163 A GB0419163 A GB 0419163A GB 0419163 D0 GB0419163 D0 GB 0419163D0
Authority
GB
United Kingdom
Prior art keywords
depolarized light
producing
producing depolarized
light
depolarized
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
GB0419163A
Other versions
GB2406166A (en
GB2406166B (en
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.)
Weatherford Lamb Inc
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 US10/649,590 external-priority patent/US7088878B2/en
Priority claimed from US10/650,117 external-priority patent/US7081959B2/en
Application filed by Weatherford Lamb Inc filed Critical Weatherford Lamb Inc
Publication of GB0419163D0 publication Critical patent/GB0419163D0/en
Publication of GB2406166A publication Critical patent/GB2406166A/en
Application granted granted Critical
Publication of GB2406166B publication Critical patent/GB2406166B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G01D5/344—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)
GB0419163A 2003-08-27 2004-08-27 Method and apparatus for producing depolarized light Active GB2406166B (en)

Applications Claiming Priority (2)

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

Publications (3)

Publication Number Publication Date
GB0419163D0 true GB0419163D0 (en) 2004-09-29
GB2406166A GB2406166A (en) 2005-03-23
GB2406166B GB2406166B (en) 2006-07-05

Family

ID=33135364

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0419047A Active GB2405469B (en) 2003-08-27 2004-08-26 Method and apparatus for providing polarization insensitive signal processing for interferometric sensors
GB0419163A Active GB2406166B (en) 2003-08-27 2004-08-27 Method and apparatus for producing depolarized light

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0419047A Active GB2405469B (en) 2003-08-27 2004-08-26 Method and apparatus for providing polarization insensitive signal processing for interferometric sensors

Country Status (2)

Country Link
CA (3) CA2639131C (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
CA2639131C (en) 2010-01-26
CA2479245C (en) 2010-01-12
CA2479081A1 (en) 2005-02-27
CA2639131A1 (en) 2005-02-27
GB0419047D0 (en) 2004-09-29
CA2479245A1 (en) 2005-02-27
CA2479081C (en) 2008-11-25
GB2406166A (en) 2005-03-23
GB2405469A (en) 2005-03-02
GB2406166B (en) 2006-07-05
GB2405469B (en) 2006-11-29

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Legal Events

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732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)