DE602007001388D1 - Erfassung einer störung - Google Patents

Erfassung einer störung

Info

Publication number
DE602007001388D1
DE602007001388D1 DE602007001388T DE602007001388T DE602007001388D1 DE 602007001388 D1 DE602007001388 D1 DE 602007001388D1 DE 602007001388 T DE602007001388 T DE 602007001388T DE 602007001388 T DE602007001388 T DE 602007001388T DE 602007001388 D1 DE602007001388 D1 DE 602007001388D1
Authority
DE
Germany
Prior art keywords
interferometer
signal
optical link
signal copies
copies
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.)
Active
Application number
DE602007001388T
Other languages
English (en)
Inventor
Peter Healey
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Publication of DE602007001388D1 publication Critical patent/DE602007001388D1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • 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
    • G01M11/3172—Reflectometers detecting the back-scattered light in the frequency-domain, e.g. OFDR, FMCW, heterodyne detection
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Power Steering Mechanism (AREA)
  • Protection Of Generators And Motors (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
DE602007001388T 2006-02-24 2007-02-01 Erfassung einer störung Active DE602007001388D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06251012A EP1826924A1 (de) 2006-02-24 2006-02-24 Abtastung einer Störung
PCT/GB2007/000360 WO2007096580A1 (en) 2006-02-24 2007-02-01 Sensing a disturbance

Publications (1)

Publication Number Publication Date
DE602007001388D1 true DE602007001388D1 (de) 2009-08-06

Family

ID=36610894

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602007001388T Active DE602007001388D1 (de) 2006-02-24 2007-02-01 Erfassung einer störung

Country Status (6)

Country Link
US (1) US7817279B2 (de)
EP (2) EP1826924A1 (de)
AT (1) ATE434873T1 (de)
CA (1) CA2643347A1 (de)
DE (1) DE602007001388D1 (de)
WO (1) WO2007096580A1 (de)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7667849B2 (en) * 2003-09-30 2010-02-23 British Telecommunications Public Limited Company Optical sensor with interferometer for sensing external physical disturbance of optical communications link
GB0322859D0 (en) * 2003-09-30 2003-10-29 British Telecomm Communication
GB0407386D0 (en) * 2004-03-31 2004-05-05 British Telecomm Monitoring a communications link
GB0421747D0 (en) * 2004-09-30 2004-11-03 British Telecomm Distributed backscattering
EP1794904A1 (de) 2004-09-30 2007-06-13 British Telecommunications Public Limited Company Identifizieren oder lokalisieren von wellenleitern
GB0427733D0 (en) * 2004-12-17 2005-01-19 British Telecomm Optical system
CA2589792A1 (en) * 2004-12-17 2006-06-22 British Telecommunications Public Limited Company Assessing a network
ATE434774T1 (de) * 2005-03-04 2009-07-15 British Telecomm Akustooptische modulatoranordnung
GB0504579D0 (en) * 2005-03-04 2005-04-13 British Telecomm Communications system
EP1708388A1 (de) 2005-03-31 2006-10-04 British Telecommunications Public Limited Company Verfahren zum Mitteilen von Informationen
EP1713301A1 (de) * 2005-04-14 2006-10-18 BRITISH TELECOMMUNICATIONS public limited company Verfahren und Gerät zur Schallübertragung über eine optische Verbindung
EP1729096A1 (de) * 2005-06-02 2006-12-06 BRITISH TELECOMMUNICATIONS public limited company Verfahren und Vorrichtung zur Ermittlung der Stelle einer Störung in einer optischen Faser
CA2643345A1 (en) * 2006-02-24 2007-08-30 British Telecommunications Public Limited Company Sensing a disturbance
CA2643344A1 (en) * 2006-02-24 2007-08-30 British Telecommunications Public Limited Company Sensing a disturbance
EP1826924A1 (de) * 2006-02-24 2007-08-29 BRITISH TELECOMMUNICATIONS public limited company Abtastung einer Störung
US8670662B2 (en) * 2006-04-03 2014-03-11 British Telecommunications Public Limited Company Evaluating the position of an optical fiber disturbance
US8682159B2 (en) * 2008-07-09 2014-03-25 Tyco Electronics Subsea Communications Llc Optical communication system supporting detection and communication networks
EP2721751B1 (de) * 2011-06-20 2017-08-16 British Telecommunications Public Limited Company Kommunikationsnetzwerk
CN110226297B (zh) 2017-02-01 2022-07-12 英国电讯有限公司 对光网络中的事件进行定位的方法、介质和光网络
CN111492599A (zh) 2018-01-09 2020-08-04 英国电讯有限公司 光数据传输系统

Family Cites Families (153)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418506A1 (fr) 1978-02-28 1979-09-21 Comp Generale Electricite Dispositif pour detecter la presence d'un objet le long d'une ligne
GB2019561B (en) 1978-04-20 1982-09-02 Davies D E N Telecommunication systems
US4370610A (en) * 1978-08-30 1983-01-25 Bicc Public Limited Company Locating sheath faults in underground power supply cables
US4443700A (en) * 1980-02-01 1984-04-17 Pedro B. Macedo Optical sensing apparatus and method
US4297887A (en) 1980-02-19 1981-11-03 The United States Of America As Represented By The Secretary Of The Navy High-sensitivity, low-noise, remote optical fiber
US4654520A (en) * 1981-08-24 1987-03-31 Griffiths Richard W Structural monitoring system using fiber optics
US4397551A (en) * 1981-10-29 1983-08-09 Northern Telecom Limited Method and apparatus for optical fiber fault location
US4463451A (en) * 1982-01-11 1984-07-31 The Standard Oil Company System for seismic digital data acquisition over water covered areas
GB2113417A (en) 1982-01-14 1983-08-03 Standard Telephones Cables Ltd Acousto-optical fibre transducer
US4572949A (en) * 1982-04-14 1986-02-25 The Board Of Trustees Of The Leland Stanford Junior University Fiber optic sensor for detecting very small displacements of a surface
GB2126820B (en) 1982-07-17 1986-03-26 Plessey Co Plc An optical sensing system
US5363463A (en) 1982-08-06 1994-11-08 Kleinerman Marcos Y Remote sensing of physical variables with fiber optic systems
US4538103A (en) * 1982-08-30 1985-08-27 John Cappon Time domain reflectometer apparatus for identifying the location of cable defects
SE433664B (sv) 1982-10-29 1984-06-04 Leif Goran Jakobsson Elvermd fastkroppsvermeackumulator integrerad med konventionell vermepanna elvermd fastkroppsvermeackumulator integrerad med konventionell vermepanna
US4593385A (en) * 1983-05-19 1986-06-03 The Charles Stark Draper Laboratory Fiber optic sensor lead fiber noise cancellation
DE3333412A1 (de) * 1983-09-16 1985-04-04 Bayer Ag, 5090 Leverkusen Fungizide mittel
JPS6085312A (ja) 1983-10-17 1985-05-14 Hitachi Ltd 固体化干渉計
US5991479A (en) 1984-05-14 1999-11-23 Kleinerman; Marcos Y. Distributed fiber optic sensors and systems
DE3421056A1 (de) * 1984-06-06 1985-12-12 Feldmühle AG, 4000 Düsseldorf Kieferimplantat zur aufnahme eines zahnersatztraegers
US4697926A (en) * 1985-02-08 1987-10-06 The Board Of Trustees Of The Leland Stanford Junior University Coherent distributed sensor and method using short coherence length sources
US4770535A (en) * 1985-02-08 1988-09-13 The Board Of Trustees Of The Leland Stanford Junior University Distributed sensor array and method using a pulsed signal source
DE3506884A1 (de) 1985-02-27 1986-08-28 Philips Patentverwaltung Gmbh, 2000 Hamburg Optisches zeitbereichsreflektometer mit heterodyn-empfang
FR2578645B1 (fr) 1985-03-07 1987-03-20 Sopha Praxis Dispositif optique de detection d'effort, procede de mesure d'effort au moyen dudit dispositif et leur application a une balance
US5051965A (en) * 1985-04-19 1991-09-24 Western Atlas International, Inc. Acousto-optical marine sensor array
US4688200A (en) * 1985-09-18 1987-08-18 Western Geophysical Company Of America Optical system for detecting acoustic wave energy in a fluid medium
US4649529A (en) * 1985-12-02 1987-03-10 Exxon Production Research Co. Multi-channel fiber optic sensor system
GB8609732D0 (en) 1986-04-22 1986-05-29 Plessey Co Plc Optical fibre sensing systems
US5311592A (en) * 1986-06-11 1994-05-10 Mcdonnell Douglas Corporation Sagnac interferometer based secure communication system
US5223967A (en) * 1986-06-11 1993-06-29 Mcdonnell Douglas Corporation Secure communications system
JPH0820506B2 (ja) * 1986-09-10 1996-03-04 海洋科学技術センター 海洋音響トモグラフィーデータ伝送装置
IL80276A0 (en) * 1986-10-10 1987-01-30 Ispra Israel Prod Res Co Ltd Wallpaper comprising an optical fibre
GB8626224D0 (en) 1986-11-03 1986-12-03 Secr Defence Fibre optic communication system
GB8706272D0 (en) 1987-03-17 1987-04-23 Sieger Ltd Fibre optic telemetry
GB8825481D0 (en) 1988-11-01 1988-12-07 British Telecomm Interferrometer
US4976507A (en) 1988-06-20 1990-12-11 Mcdonnell Douglas Corporation Sagnac distributed sensor
US4907856A (en) * 1988-08-29 1990-03-13 Motorola, Inc. Acoustooptic transducer arrangement for optical fibers
US4904050A (en) 1988-08-31 1990-02-27 American Telephone And Telegraph Company, At&T Bell Laboratories Methods of and systems for optical fiber sensing
FR2636778B1 (fr) * 1988-08-31 1990-12-14 Sgs Thomson Microelectronics Transistor mos composite et application a une diode roue libre
US4900921A (en) 1988-09-19 1990-02-13 Simmonds Precision Products, Inc. System and method for opto-acoustic liquid quantity measurement and transducer therefor
DE3832569A1 (de) * 1988-09-24 1990-03-29 Philips Patentverwaltung Faseroptischer sensor
US5191614A (en) * 1988-11-14 1993-03-02 Mcdonnell Douglas Corporation Secure communication system
GB8828408D0 (en) * 1988-12-06 1989-01-05 British Telecomm Loss detector
EP0377549B1 (de) 1989-01-03 1998-12-09 Marcos Y. Kleinerman Fernmessung physikalischer Variablen mit faseroptischen Systemen
US4991923A (en) * 1989-01-17 1991-02-12 Board Of Trustees Of The Leland Stanford Junior University Acousto-optic modulator for optical fibers using Hertzian contact with a grooved transducer substrate
US4897543A (en) 1989-01-25 1990-01-30 The United States Of America As Represented By The Secretary Of The Navy Apparatus and method for minimizing polarization-induced signal fading in an interferometric fiber-optic sensor using input-polarization control
CA2011303C (en) * 1989-03-02 1996-10-15 Shintaro Sentsui Method for identifying an optical transmission medium, apparatus for identifying the same and method for optical telecommunication
US5015842A (en) * 1989-06-01 1991-05-14 United Technologies Corporation High density fiber optic damage detection system
US4994668A (en) * 1989-09-01 1991-02-19 The United States Of America As Represented By The Secretary Of The Navy Planar fiber-optic interferometric acoustic sensor
US5046848A (en) * 1989-09-08 1991-09-10 Mcdonnell Douglas Corporation Fiber optic detection system using a Sagnac interferometer
US5025423A (en) * 1989-12-21 1991-06-18 At&T Bell Laboratories Enhanced bottom sonar system
GB9007974D0 (en) * 1990-04-09 1990-06-06 British Telecomm Loss detection
US5104391A (en) * 1990-10-30 1992-04-14 Advanced Cardiovascular Systems Optical fiber breakage detection system
JPH04204805A (ja) 1990-11-30 1992-07-27 Furukawa Electric Co Ltd:The 光ケーブル識別方法
US5093568A (en) * 1990-12-14 1992-03-03 John Maycock Monitoring system for fiber optic cables utilizing an OTDR for detection of signal loss and automatic location of faults in the cable
US5140559A (en) * 1991-02-21 1992-08-18 The United States Of America As Represented By The Secretary Of The Navy Low flow-noise conformal fiber optic hydrophone
US5173743A (en) 1991-05-28 1992-12-22 Litton Systems, Inc. Fiber optical time-division-multiplexed unbalanced pulsed interferometer with polarization fading compensation
US5194847A (en) * 1991-07-29 1993-03-16 Texas A & M University System Apparatus and method for fiber optic intrusion sensing
WO1993003400A1 (fr) * 1991-08-02 1993-02-18 The Furukawa Electric Co., Ltd. Procede de sondage d'une ligne de transmission optique
FR2682774B1 (fr) * 1991-10-17 1996-02-16 Geophysique Cie Gle Dispositif d'emission acoustique pour sismique marine.
GB2262803A (en) 1991-12-24 1993-06-30 Marconi Gec Ltd An optical fibre sensor array
US5206924A (en) * 1992-01-31 1993-04-27 The United States Of America As Represented By The Secretary Of The Navy Fiber optic Michelson sensor and arrays with passive elimination of polarization fading and source feedback isolation
GB9202564D0 (en) 1992-02-07 1992-03-25 Marconi Gec Ltd Optical signal transmission network
AU666382B2 (en) 1992-05-01 1996-02-08 Nippon Telegraph & Telephone Corporation Method for identifying optical line
WO1993025866A1 (en) 1992-06-05 1993-12-23 Monash University Sensing patches utilising incorporated waveguide sensor
US5355208A (en) * 1992-06-24 1994-10-11 Mason & Hanger National, Inc. Distributed fiber optic sensor for locating and identifying remote disturbances
FR2694088B1 (fr) * 1992-07-27 1994-09-02 France Telecom Système interférométrique de détection et de localisation de défauts réflecteurs de structures guidant la lumière.
US5313266A (en) * 1992-08-17 1994-05-17 Keolian Robert M Demodulators for optical fiber interferometers with [3×3] outputs
US5359412A (en) * 1992-10-20 1994-10-25 Massachusetts Institute Of Technology Optical frequency discriminator using two mach-zehnder interferometer arrangement
US5361130A (en) 1992-11-04 1994-11-01 The United States Of America As Represented By The Secretary Of The Navy Fiber grating-based sensing system with interferometric wavelength-shift detection
US5351318A (en) * 1993-04-05 1994-09-27 The Board Of Trustees Of The Leland Stanford Jr./University Fiber optic communication system and fiber optic modulator
US5373487A (en) 1993-05-17 1994-12-13 Mason & Hanger National, Inc. Distributed acoustic sensor
US5307410A (en) * 1993-05-25 1994-04-26 International Business Machines Corporation Interferometric quantum cryptographic key distribution system
US6440457B1 (en) * 1993-05-27 2002-08-27 Alza Corporation Method of administering antidepressant dosage form
US5384635A (en) * 1993-08-10 1995-01-24 At&T Corp. Remote sensing in optical fiber networks by synchronously detecting backscattered optical signals
GB9324333D0 (en) * 1993-11-26 1994-01-12 Sensor Dynamics Ltd Measurement of one or more physical parameters
US5473459A (en) 1993-12-03 1995-12-05 Optimux Systems Corporation Optical telecommunications system using phase compensation interferometry
US5691957A (en) 1994-06-30 1997-11-25 Woods Hole Oceanographic Institution Ocean acoustic tomography
US5497233A (en) * 1994-07-27 1996-03-05 Litton Systems, Inc. Optical waveguide vibration sensor and method
DE4428650A1 (de) * 1994-08-12 1996-02-15 Marinitsch Waldemar Optische Druckkrafterfassungsvorrichtung
GB2292495B (en) * 1994-08-17 1998-03-25 Northern Telecom Ltd Fault location in optical communication systems
US5589937A (en) * 1994-10-31 1996-12-31 The United States Of America As Represented By The Secretary Of The Navy Fiber optic self-multiplexing amplified ring transducer and force transfer sensor with pressure compensation
US5502782A (en) * 1995-01-09 1996-03-26 Optelecom, Inc. Focused acoustic wave fiber optic reflection modulator
US5636021A (en) * 1995-06-02 1997-06-03 Udd; Eric Sagnac/Michelson distributed sensing systems
GB9515498D0 (en) 1995-07-28 1995-09-27 Bicc Plc Optical fibre system
US5625724A (en) 1996-03-06 1997-04-29 Litton Systems, Inc Fiber optic hydrophone having rigid mandrel
US5767950A (en) * 1996-04-15 1998-06-16 Eastman Kodak Company Method and apparatus for calibrating iris of photographic printer
US5663927A (en) * 1996-05-23 1997-09-02 The United States Of America As Represented By The Secretary Of The Navy Buoyed sensor array communications system
US5936719A (en) * 1996-07-16 1999-08-10 Johnson; Robert W. Test unit and method for simultaneous testing of multiple optical fibers
FR2751746B1 (fr) 1996-07-24 1998-10-23 Boitel Michel Procede et dispositif de mesure par reflectometrie pour connexion de fibre optique
US5825516A (en) 1996-07-25 1998-10-20 Hewlett-Packard Company Optical power meter for detecting loss factors in fiber optic communications
US6072921A (en) * 1997-07-18 2000-06-06 Litton Systems, Inc. Method of operating a fiber-optic acoustical sensor, apparatus for practicing the method, and in-line fiber-optic polarizer usable in such apparatus
US5778114A (en) * 1997-04-18 1998-07-07 Eslambolchi; Hossein Fiber analysis method and apparatus
GB9721473D0 (en) * 1997-10-09 1997-12-10 Sensor Dynamics Ltd Interferometric sensing apparatus
US5982791A (en) 1998-01-14 1999-11-09 Hewlett-Packard Company Wavelength tracking in adjustable optical systems
US6115520A (en) * 1998-03-05 2000-09-05 Lucent Technologies Inc. Compact mach-zehnder interferometer and wavelength reference employing same
EP1496723B1 (de) 1998-04-03 2010-07-07 The Board Of Trustees Of The Leland Stanford Junior University Auf Sagnac-Interferometer basierende faseroptische akustische Sensormatrixanordnung
US6278657B1 (en) 1998-04-03 2001-08-21 The Board Of Trustees Of The Leland Stanford Junior University Folded sagnac sensor array
US6456381B1 (en) 1998-04-28 2002-09-24 Fujikura Ltd. Apparatus for and method of using optical interference of light propagating through an optical fiber loop
US6285806B1 (en) * 1998-05-31 2001-09-04 The United States Of America As Represented By The Secretary Of The Navy Coherent reflectometric fiber Bragg grating sensor array
FR2779296B1 (fr) * 1998-06-02 2000-08-18 France Telecom Dispositif pour l'emission ou la reception d'un signal crypte par chaos deterministe
US6315463B1 (en) 1998-08-21 2001-11-13 Infineon Technologies Ag Method for production of an optoelectronic female connector element, and an optoelectronic connector
US5975697A (en) 1998-11-25 1999-11-02 Oti Ophthalmic Technologies, Inc. Optical mapping apparatus with adjustable depth resolution
JP3759845B2 (ja) * 1998-12-16 2006-03-29 富士通株式会社 光伝送路の監視のための方法及びシステム
US6381011B1 (en) * 1999-02-19 2002-04-30 Wilcom, Inc. Optical fault locator
US6459486B1 (en) * 1999-03-10 2002-10-01 Eric Udd Single fiber Sagnac sensing system
US6148123A (en) 1999-03-17 2000-11-14 At&T Corp Method and apparatus for measuring optical distances
US6788417B1 (en) * 1999-04-30 2004-09-07 The Regents Of The University Of California Optical fiber infrasound sensor
US6194706B1 (en) * 1999-05-19 2001-02-27 Lucent Technologies Inc. Methods and systems for locating buried fiber optic cables
US6269198B1 (en) * 1999-10-29 2001-07-31 Litton Systems, Inc. Acoustic sensing system for downhole seismic applications utilizing an array of fiber optic sensors
CA2320394A1 (en) 1999-10-29 2001-04-29 Litton Systems, Inc. Acoustic sensing system for downhole seismic applications utilizing an array of fiber optic sensors
US20010028766A1 (en) * 1999-11-23 2001-10-11 Hamid Hatami-Hanza Interferometer based optical devices such as amplifiers
JP2001194109A (ja) 2000-01-14 2001-07-19 Nippon Koei Yokohama Works Co Ltd レイリー散乱を利用した変位計測装置
DE10010996A1 (de) 2000-03-07 2001-09-13 Alcatel Sa Optisches Kabel
US6489606B1 (en) 2000-04-07 2002-12-03 Cidra Corporation Bragg grating sensor system with spectral response or code division multiplexing
US7110677B2 (en) * 2001-09-26 2006-09-19 Celight, Inc. Method and system for optical time division multiplexed fiber communications with coherent detection
FR2818388B1 (fr) * 2000-12-15 2003-02-14 Inst Francais Du Petrole Methode et dispositif d'exploration sismique d'une zone souterraine immergee, utilisant des recepteurs sismiques couples avec le fond de l'eau
US6594055B2 (en) * 2001-01-17 2003-07-15 Oyster Optics, Inc. Secure fiber optic telecommunications system and method
GB0103665D0 (en) 2001-02-15 2001-03-28 Secr Defence Road traffic monitoring system
JP2002257682A (ja) 2001-03-02 2002-09-11 Ando Electric Co Ltd 波長分散分布測定器、及び測定方法
US6606148B2 (en) * 2001-04-23 2003-08-12 Systems And Processes Engineering Corp. Method and system for measuring optical scattering characteristics
EP1423986B1 (de) 2001-08-10 2017-10-04 The Board of Trustees of the Leland Stanford Junior University Vorrichtung und verfahren zur verarbeitung optischer signale aus zwei verzögerungsspulen zur erhöhung des dynamikumfangs eines faseroptischen sensorarrays auf sagnac-basis
US6628570B2 (en) * 2001-08-20 2003-09-30 The United States Of America As Represented By The Secretary Of The Navy Laser velocimetry detection of underwater sound
US6798523B2 (en) * 2001-12-04 2004-09-28 Honeywell International Inc. Sensor and method for detecting fiber optic faults
FR2833359B1 (fr) * 2001-12-10 2004-04-23 Inst Francais Du Petrole Systeme d'acquisition de donnees sismiques utilisant des stations d'acquisition posees sur le fond marin
US6813403B2 (en) * 2002-03-14 2004-11-02 Fiber Optic Systems Technology, Inc. Monitoring of large structures using brillouin spectrum analysis
US6775203B2 (en) 2002-07-18 2004-08-10 Input/Output, Inc. Seismic seabed cable with sensor units
GB0220914D0 (en) * 2002-09-10 2002-10-23 Qinetiq Ltd Lidar apparatus and method
EP1432149B1 (de) * 2002-12-16 2007-08-08 Aston Photonic Technologies Ltd. Optisches Wellenleiter-Gitter Abfragesystem und Sensorsystem
GB0302434D0 (en) * 2003-02-03 2003-03-05 Sensor Highway Ltd Interferometric method and apparatus for measuring physical parameters
US6975397B2 (en) 2003-02-27 2005-12-13 Biotools, Inc. Polarization state conversion in optically active spectroscopy
US6933845B2 (en) * 2003-04-08 2005-08-23 Lockheed Martin Corporation Photon intrusion detector
US7006230B2 (en) * 2003-05-16 2006-02-28 Lucent Technologies Inc. Interferometric method and apparatus for the characterization of optical pulses
GB2401738A (en) 2003-05-16 2004-11-17 Radiodetection Ltd Optical fibre sensor
WO2005008443A2 (en) 2003-07-14 2005-01-27 Environmental Security Corporation Distributed sensor array for fluid contaminant monitoring
US6859419B1 (en) * 2003-08-18 2005-02-22 The United States Of America As Represented By The Secretary Of The Navy Laser-based acousto-optic uplink communications technique
US7667849B2 (en) * 2003-09-30 2010-02-23 British Telecommunications Public Limited Company Optical sensor with interferometer for sensing external physical disturbance of optical communications link
GB0322859D0 (en) * 2003-09-30 2003-10-29 British Telecomm Communication
GB0407386D0 (en) * 2004-03-31 2004-05-05 British Telecomm Monitoring a communications link
JP4809770B2 (ja) * 2004-08-30 2011-11-09 三菱電機株式会社 海底観測システム
EP1794904A1 (de) 2004-09-30 2007-06-13 British Telecommunications Public Limited Company Identifizieren oder lokalisieren von wellenleitern
GB0421747D0 (en) * 2004-09-30 2004-11-03 British Telecomm Distributed backscattering
GB0427733D0 (en) * 2004-12-17 2005-01-19 British Telecomm Optical system
CA2589792A1 (en) * 2004-12-17 2006-06-22 British Telecommunications Public Limited Company Assessing a network
JP5060310B2 (ja) * 2005-01-11 2012-10-31 フューチャー ファイバー テクノロジーズ ピーティーワイ リミテッド 事象の位置を決定するための、対向伝搬信号を使用した装置および方法
GB0504579D0 (en) * 2005-03-04 2005-04-13 British Telecomm Communications system
ATE434774T1 (de) * 2005-03-04 2009-07-15 British Telecomm Akustooptische modulatoranordnung
EP1708388A1 (de) * 2005-03-31 2006-10-04 British Telecommunications Public Limited Company Verfahren zum Mitteilen von Informationen
EP1713301A1 (de) * 2005-04-14 2006-10-18 BRITISH TELECOMMUNICATIONS public limited company Verfahren und Gerät zur Schallübertragung über eine optische Verbindung
EP1729096A1 (de) * 2005-06-02 2006-12-06 BRITISH TELECOMMUNICATIONS public limited company Verfahren und Vorrichtung zur Ermittlung der Stelle einer Störung in einer optischen Faser
JP4768421B2 (ja) * 2005-12-06 2011-09-07 富士通株式会社 Ｄｑｐｓｋ光受信器
CA2643345A1 (en) * 2006-02-24 2007-08-30 British Telecommunications Public Limited Company Sensing a disturbance
EP1826924A1 (de) * 2006-02-24 2007-08-29 BRITISH TELECOMMUNICATIONS public limited company Abtastung einer Störung
US8670662B2 (en) * 2006-04-03 2014-03-11 British Telecommunications Public Limited Company Evaluating the position of an optical fiber disturbance

Also Published As

Publication number Publication date
US20090097844A1 (en) 2009-04-16
WO2007096580A1 (en) 2007-08-30
EP1989798B1 (de) 2009-06-24
ATE434873T1 (de) 2009-07-15
EP1826924A1 (de) 2007-08-29
CA2643347A1 (en) 2007-08-30
US7817279B2 (en) 2010-10-19
EP1989798A1 (de) 2008-11-12

Similar Documents

Publication Publication Date Title
ATE434873T1 (de) Erfassung einer störung
ATE480914T1 (de) Verteilte rückstreuung
ATE505861T1 (de) Erfassen einer störung
WO2005095917A3 (en) Evaluating the position of a time-varying disturbance
WO2009087359A3 (en) Internet activity evaluation method and system
WO2008092611A8 (de) Verfahren und vorrichtung zur bestimmung einer entfernung zu einem rückstrahlenden objekt
EP1878142A4 (de) Verfahren und einrichtung zur optischen leistungsfähigkeitsüberwachung im band
DE602005020614D1 (de) Verfahren und Vorrichtung für redundante Abstandsmessung und für das Aufheben von Phasenversatz
WO2011126610A3 (en) Interferometric encoder systems
WO2010081019A3 (en) All-optical logic gates and methods for their fabrication
WO2009034515A3 (en) Ambient light compensation sensor and procedure
NO20072859L (no) Adaptiv utligner med dobbelmodusmaskegenerator med aktive uttak og en enhet for pilotreferansesignalamplitudestyring
WO2006001868A3 (en) Phase responsive optical fiber sensor
NO20072430L (no) Fremgangsmate og anordning for innhenting av marine seismikkdata
WO2008103390A3 (en) Orthostasis detection system and method
BRPI0700242A (pt) método e dispositivo para cancelamento de interferências
WO2011039501A3 (en) Phase based sensing
TW200713187A (en) Display, column driver integrated circuit, and multi-level detector, and multi-level detection method
WO2012082555A3 (en) Cyclic error compensation in inteferometric encoder systems
JP2008524573A5 (de)
JP2012514199A5 (de)
EP1347265A3 (de) Schwingungsrauschreduktion in einem interferometrischen system
TW200516343A (en) Photomask, photomask manufacturing method and semiconductor device manufacturing method using photomask
WO2013182567A3 (de) Optisches messsystem mit polarisationskompensation, sowie entsprechendes verfahren
FI20165832A (fi) Järjestely polvidiagnostiikkaan

Legal Events

Date Code Title Description
8364 No opposition during term of opposition