GB2403801A - Optical time domain reflectometry - Google Patents

Optical time domain reflectometry Download PDF

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Publication number
GB2403801A
GB2403801A GB0415289A GB0415289A GB2403801A GB 2403801 A GB2403801 A GB 2403801A GB 0415289 A GB0415289 A GB 0415289A GB 0415289 A GB0415289 A GB 0415289A GB 2403801 A GB2403801 A GB 2403801A
Authority
GB
United Kingdom
Prior art keywords
section
optical
intensity threshold
linear effects
probe wavelength
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
GB0415289A
Other versions
GB2403801B (en
GB0415289D0 (en
Inventor
Arthur Harold Hartog
Peter Wait
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.)
Sensor Highway Ltd
Original Assignee
Sensor Highway Ltd
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 Sensor Highway Ltd filed Critical Sensor Highway Ltd
Priority to GB0516087A priority Critical patent/GB2416587B/en
Priority to GB0516101A priority patent/GB2416588B/en
Publication of GB0415289D0 publication Critical patent/GB0415289D0/en
Publication of GB2403801A publication Critical patent/GB2403801A/en
Application granted granted Critical
Publication of GB2403801B publication Critical patent/GB2403801B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/319—Reflectometers using stimulated back-scatter, e.g. Raman or fibre amplifiers
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]

Abstract

An optical time domain reflectometry method of sensing a parameter to be measured in a region of interest comprises launching optical radiation (4) at a probe wavelength into an-optical fibre (5, 6) and producing electrical output signals in response to optical radiation backscattered from the optical fibre (5, 6). In one aspect of the invention the optical fibre comprises first and second sections (5, 6), the second section (6) having a lower intensity threshold for the onset of non-linear effects than the first section (5) and being deployed in the region of interest. Optical radiation (4) at the probe wavelength is launched into the said first section (5) at an intensity lower than the non-linear effects intensity threshold of the first section (5) but higher than the non-linear effects intensity threshold of the second section (6), the attenuation characteristics of the said first section (5) being chosen so that the intensity of the optical radiation (4) at the probe wavelength reaching the second section (6) is below that of the non-linear effects intensity threshold of the said second section (6). In another aspect of the invention the optical fibre comprises first and second sections connected together by a remote amplifier, the gain of the amplifier being selected so as to compensate for attenuation losses in the probe wavelength in the first section.

Description

GB 2403801 A continuation (74) Agent and/or Address for Service: Sensa
Gamma House, Enterprise Road, Chilworth Science Park, SOUTHAMPTON, Hampshire, SO16 7NS, United Kingdom
GB0415289A 2002-01-30 2003-01-30 Optical time domain reflectometry Expired - Fee Related GB2403801B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0516087A GB2416587B (en) 2002-01-30 2003-01-30 Optical time domain reflectometry
GB0516101A GB2416588B (en) 2002-01-30 2003-01-30 Optical time domain reflectometry

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0202159.0A GB0202159D0 (en) 2002-01-30 2002-01-30 OPtical time domain reflectometry
PCT/GB2003/000385 WO2003065619A2 (en) 2002-01-30 2003-01-30 Optical time domain reflectometry

Publications (3)

Publication Number Publication Date
GB0415289D0 GB0415289D0 (en) 2004-08-11
GB2403801A true GB2403801A (en) 2005-01-12
GB2403801B GB2403801B (en) 2006-04-05

Family

ID=9930059

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB0202159.0A Ceased GB0202159D0 (en) 2002-01-30 2002-01-30 OPtical time domain reflectometry
GB0415289A Expired - Fee Related GB2403801B (en) 2002-01-30 2003-01-30 Optical time domain reflectometry

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0202159.0A Ceased GB0202159D0 (en) 2002-01-30 2002-01-30 OPtical time domain reflectometry

Country Status (6)

Country Link
US (2) US7304725B2 (en)
AU (1) AU2003205840A1 (en)
BR (1) BR0307113A (en)
GB (2) GB0202159D0 (en)
RU (1) RU2325762C2 (en)
WO (1) WO2003065619A2 (en)

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WO2011044887A1 (en) * 2009-10-15 2011-04-21 Hottinger Baldwin Messtechnik Gmbh Optical measuring method having scattered-light elimination and device therefor
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US8542353B2 (en) 2010-09-30 2013-09-24 Precision Energy Services, Inc. Refractive index sensor for fluid analysis
US8411262B2 (en) 2010-09-30 2013-04-02 Precision Energy Services, Inc. Downhole gas breakout sensor
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US9089579B2 (en) 2011-01-19 2015-07-28 Topokine Therapeutics, Inc. Methods and compositions for treating metabolic syndrome
CN102494801B (en) * 2011-12-07 2013-05-29 电子科技大学 Distributed optical delay optical fiber temperature sensor
US8426471B1 (en) 2011-12-19 2013-04-23 Topokine Therapeutics, Inc. Methods and compositions for reducing body fat and adipocytes
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US20130208762A1 (en) 2012-02-14 2013-08-15 Halliburton Energy Services Inc. Suppression of Stimulated Raman Scattering
RU2503879C1 (en) * 2012-08-07 2014-01-10 Общество с ограниченной ответственностью "Т8" (ООО "Т8") Control device of object movement in pipeline
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WO2014186504A1 (en) 2013-05-15 2014-11-20 Topokine Therapeutics, Inc. Methods and compositions for topical delivery of prostaglandins to subcutaneous fat
US10188661B2 (en) 2014-06-27 2019-01-29 Topokine Therapeutics, Inc. Topical dosage regimen
US10247851B2 (en) * 2014-08-25 2019-04-02 Halliburton Energy Services, Inc. Hybrid fiber optic cable for distributed sensing
CA2966398A1 (en) * 2014-12-30 2016-07-07 Halliburton Energy Services, Inc. Correction of chromatic dispersion in remote distributed sensing
US10843290B2 (en) 2015-01-19 2020-11-24 Weatherford Technology Holdings, Llc Acoustically enhanced optical cables
US20170010385A1 (en) * 2015-07-08 2017-01-12 Schlumberger Technology Corporation Fiber optic array having densely spaced, weak reflectors
US10386247B2 (en) * 2016-09-29 2019-08-20 Ofs Fitel, Llc Extending a range of an optical fiber distributed sensing system
JP7200932B2 (en) * 2017-05-11 2023-01-10 住友電気工業株式会社 NONLINEARITY MEASUREMENT METHOD AND NONLINEARITY MEASUREMENT DEVICE
CN107167168B (en) * 2017-05-24 2019-07-23 上海大学 Phase sensitive optical time domain reflection distributed optical fiber sensing system accurate positioning method
EP3662308A4 (en) 2017-08-01 2021-04-21 Services Pétroliers Schlumberger Simultaneous distributed measurement monitoring over multiple fibers
CA3067864A1 (en) * 2017-08-09 2019-02-14 Halliburton Energy Services, Inc. Distributed sensing interrogator using single-mode fiber for multi-mode fiber interrogation
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US11920963B2 (en) 2018-12-13 2024-03-05 Ariel Scientific Innovations Ltd. Method and system for optical fiber sensing
RU2715489C1 (en) * 2019-08-20 2020-02-28 Федеральное Государственное Унитарное Предприятие "Всероссийский Научно-Исследовательский Институт Физико-Технических И Радиотехнических Измерений" (Фгуп "Вниифтри") Method for distributed amplification of power of optical signals for systems for comparison and synchronization of time scales and optical fiber reflectometers
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Also Published As

Publication number Publication date
BR0307113A (en) 2004-12-14
GB2403801B (en) 2006-04-05
US20050117830A1 (en) 2005-06-02
US7304725B2 (en) 2007-12-04
US20080030739A1 (en) 2008-02-07
GB0415289D0 (en) 2004-08-11
RU2004126231A (en) 2006-01-27
GB0202159D0 (en) 2002-03-20
US7595865B2 (en) 2009-09-29
WO2003065619A3 (en) 2004-05-06
AU2003205840A1 (en) 2003-09-02
WO2003065619A2 (en) 2003-08-07
RU2325762C2 (en) 2008-05-27

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20170130