GB2405469B - 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

Info

Publication number
GB2405469B
GB2405469B GB0419047A GB0419047A GB2405469B GB 2405469 B GB2405469 B GB 2405469B GB 0419047 A GB0419047 A GB 0419047A GB 0419047 A GB0419047 A GB 0419047A GB 2405469 B GB2405469 B GB 2405469B
Authority
GB
United Kingdom
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.)
Expired - Lifetime
Application number
GB0419047A
Other versions
GB0419047D0 (en
GB2405469A (en
Inventor
Ole Henrik Waagaard
Eriend Roennekleiv
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
Weatherford Lamb Inc
Original Assignee
Optoplan AS
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 Optoplan AS, Weatherford Lamb Inc filed Critical Optoplan AS
Publication of GB0419047D0 publication Critical patent/GB0419047D0/en
Publication of GB2405469A publication Critical patent/GB2405469A/en
Application granted granted Critical
Publication of GB2405469B publication Critical patent/GB2405469B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
  • Optical Transform (AREA)
  • Length Measuring Devices By Optical Means (AREA)
GB0419047A 2003-08-27 2004-08-26 Method and apparatus for providing polarization insensitive signal processing for interferometric sensors Expired - Lifetime GB2405469B (en)

Applications Claiming Priority (2)

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
US10/649,590 US7088878B2 (en) 2003-08-27 2003-08-27 Method and apparatus for producing depolarized light

Publications (3)

Publication Number Publication Date
GB0419047D0 GB0419047D0 (en) 2004-09-29
GB2405469A GB2405469A (en) 2005-03-02
GB2405469B true GB2405469B (en) 2006-11-29

Family

ID=33135364

Family Applications (2)

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

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0419163A Expired - Lifetime GB2406166B (en) 2003-08-27 2004-08-27 Method and apparatus for producing depolarized light

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
EP3137853B1 (en) * 2014-04-28 2019-08-21 Optoplan AS Interferometric optical fibre sensor system and method of interrogation
CA2968996A1 (en) 2014-12-04 2016-06-09 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

Citations (2)

* 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
WO2000079335A1 (en) * 1999-06-23 2000-12-28 Optoplan As Elimination of polarization fading in unbalanced optical measuring interferometers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CA2393172C (en) * 2002-07-12 2008-11-04 Itf Technologies Optiques Inc.- Itf Optical Technologies Inc. All-fiber linear design depolarizer

Patent Citations (2)

* 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
WO2000079335A1 (en) * 1999-06-23 2000-12-28 Optoplan As Elimination of polarization fading in unbalanced optical measuring interferometers

Also Published As

Publication number Publication date
CA2479245A1 (en) 2005-02-27
GB2406166A (en) 2005-03-23
CA2639131A1 (en) 2005-02-27
CA2479081C (en) 2008-11-25
GB0419047D0 (en) 2004-09-29
GB2405469A (en) 2005-03-02
CA2639131C (en) 2010-01-26
GB0419163D0 (en) 2004-09-29
CA2479081A1 (en) 2005-02-27
GB2406166B (en) 2006-07-05
CA2479245C (en) 2010-01-12

Similar Documents

Publication Publication Date Title
AU2002222950A1 (en) Method and apparatus for placing and interrogating downhole sensors
GB2398867B (en) Interferometric method and apparatus for measuring physical parameters
AU2001262915A1 (en) High sensitivity infrared sensing apparatus and related method thereof
GB2412043B (en) Signal processing apparatus and methods
AU2003902318A0 (en) Improved Sensing Apparatus And Method
AU2003278216A1 (en) System and method for capacitive measuring
NO20054191D0 (en) Acceleration sensor and method of detecting scratch position
EP1290414A4 (en) Method and apparatus for wavefront sensing
AU2003249289A8 (en) Apparatus and method for absolute angular position sensing
AU2003295167A1 (en) Sensing apparatus and method
GB2414300B (en) Signal processing method and apparatus
EP1511033A4 (en) Signal processing device and signal processing method
DE60114515D1 (en) Signal processing apparatus and method
AU2003221067A1 (en) Frequency characteristics measuring method and device for acceleration sensor
GB0321041D0 (en) Sensor apparatus and system
GB2411481B (en) Signal measurement and processing method and apparatus
AU2001268094A1 (en) Apparatus and method for measuring selected physical condition of an animate subject
GB2405469B (en) Method and apparatus for providing polarization insensitive signal processing for interferometric sensors
AU2003274949A8 (en) Signal cross polarization system and method
GB2407416B (en) Method of processing seismic data acquired by means of multicomponent sensors
AU2003214281A1 (en) Method and apparatus for sensing
GB2406638B (en) Interferometric measurement apparatus and method therefor
GB2439236B (en) Signal measurement and processing method and apparatus
GB0421944D0 (en) An apparatus and method for measuring the zero setting of a sensor within an hydrauclic system
EP1277840A4 (en) Drug sensitivity measuring method

Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20240825