ATE498954T1 - Netzwerkbeurteilung - Google Patents

Netzwerkbeurteilung

Info

Publication number
ATE498954T1
ATE498954T1 AT05826466T AT05826466T ATE498954T1 AT E498954 T1 ATE498954 T1 AT E498954T1 AT 05826466 T AT05826466 T AT 05826466T AT 05826466 T AT05826466 T AT 05826466T AT E498954 T1 ATE498954 T1 AT E498954T1
Authority
AT
Austria
Prior art keywords
test signals
main line
branch
network
line
Prior art date
Application number
AT05826466T
Other languages
English (en)
Inventor
Edmund Sergio Robert Sikora
Peter Healey
Original Assignee
British Telecomm
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 GB0427734A external-priority patent/GB0427734D0/en
Priority claimed from GB0506591A external-priority patent/GB0506591D0/en
Application filed by British Telecomm filed Critical British Telecomm
Application granted granted Critical
Publication of ATE498954T1 publication Critical patent/ATE498954T1/de

Links

Classifications

    • 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
    • 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]
    • 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
    • H04B10/27—Arrangements for networking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/44—Star or tree networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computing Systems (AREA)
  • Optical Communication System (AREA)
  • Paper (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Small-Scale Networks (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
AT05826466T 2004-12-17 2005-12-15 Netzwerkbeurteilung ATE498954T1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0427734A GB0427734D0 (en) 2004-12-17 2004-12-17 Assessing a network
GB0506591A GB0506591D0 (en) 2005-03-31 2005-03-31 Assessing a network
PCT/GB2005/004850 WO2006064243A1 (en) 2004-12-17 2005-12-15 Assessing a network

Publications (1)

Publication Number Publication Date
ATE498954T1 true ATE498954T1 (de) 2011-03-15

Family

ID=35788212

Family Applications (1)

Application Number Title Priority Date Filing Date
AT05826466T ATE498954T1 (de) 2004-12-17 2005-12-15 Netzwerkbeurteilung

Country Status (8)

Country Link
US (1) US8045174B2 (de)
EP (1) EP1825613B1 (de)
JP (1) JP4782798B2 (de)
KR (1) KR20070095909A (de)
AT (1) ATE498954T1 (de)
CA (1) CA2589792A1 (de)
DE (1) DE602005026439D1 (de)
WO (1) WO2006064243A1 (de)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0322859D0 (en) * 2003-09-30 2003-10-29 British Telecomm Communication
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
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
WO2006035198A1 (en) 2004-09-30 2006-04-06 British Telecommunications Public Limited Company Identifying or locating waveguides
GB0427733D0 (en) * 2004-12-17 2005-01-19 British Telecomm Optical system
GB0504579D0 (en) * 2005-03-04 2005-04-13 British Telecomm Communications system
WO2006092606A1 (en) * 2005-03-04 2006-09-08 British Telecommunications Public Limited Company Acousto-optical modulator arrangement
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
US7961331B2 (en) * 2006-02-24 2011-06-14 British Telecommunications Public Limited Company Sensing a disturbance along an optical path
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
TW201023536A (en) * 2008-12-03 2010-06-16 Univ Nat Taiwan Science Tech Optical network monitoring system and method
JP5613371B2 (ja) * 2008-12-08 2014-10-22 日本電信電話株式会社 光ファイバ心線対照用試験方法及び装置並びにシステム
US8390797B2 (en) * 2009-12-17 2013-03-05 At & T Intellectual Property I, Lp Enhanced optical time-domain reflectometer resolution using depolarization of light source
ATE557521T1 (de) * 2010-02-26 2012-05-15 Alcatel Lucent Verfahren zur zuweisung von teilnehmerendgeräten an die datenaufzeichnung eines teilnehmers, vermarkungspunkteinheit und netzwerkelement
IL206723A0 (en) * 2010-06-30 2010-12-30 Eci Telecom Ltd Technology for fault allocation in passive optical networks (pon)
US8797518B2 (en) * 2010-10-07 2014-08-05 At&T Intellectual Property I, L.P. Identifiable visible light sources for fiber optic cables
WO2012087205A1 (en) 2010-12-22 2012-06-28 Telefonaktiebolaget Lm Ericsson (Publ) Otdr trace analysis in pon systems
WO2012175913A1 (en) * 2011-06-20 2012-12-27 British Telecommunications Public Limited Company Communications network
EP2726836B1 (de) 2011-06-30 2020-06-24 Telefonaktiebolaget LM Ericsson (publ) Otdr-spurenanalyse in pon-systemen
WO2012149709A1 (zh) * 2011-08-22 2012-11-08 华为技术有限公司 一种光分配网的故障检测方法、装置和光网络系统
TWI502906B (zh) * 2012-11-01 2015-10-01 Univ Nat Taiwan Science Tech 主動式網路監控系統及其監控方法
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
EP3738228A1 (de) 2018-01-09 2020-11-18 British Telecommunications public limited company System zur optischen datenübertragung
US11470117B2 (en) * 2020-05-18 2022-10-11 Nec Corporation Physical layer security in network sensing architecture
CN112858345B (zh) * 2021-01-22 2022-03-11 中国工程物理研究院激光聚变研究中心 一种随机移相的光学元件缺陷快速超分辨检测装置及检测方法
US20220247488A1 (en) * 2021-02-02 2022-08-04 Huawei Technologies Co., Ltd. Method and system inspecting fibered optical communication paths

Family Cites Families (160)

* 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
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
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
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
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
US5223967A (en) 1986-06-11 1993-06-29 Mcdonnell Douglas Corporation Secure communications system
US5311592A (en) 1986-06-11 1994-05-10 Mcdonnell Douglas Corporation Sagnac interferometer based secure communication 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
FR2636778B1 (fr) 1988-08-31 1990-12-14 Sgs Thomson Microelectronics Transistor mos composite et application a une diode roue libre
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
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
DE377549T1 (de) 1989-01-03 1990-11-08 Marcos Y. Southbridge Mass. 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
EP0390341B1 (de) 1989-03-02 1995-06-07 The Furukawa Electric Co., Ltd. Verfahren und Vorrichtung zum Identifizieren eines optischen Übertragungsmediums
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
CA2112692C (en) 1992-05-01 2004-09-21 Akira Inoue 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
GB9315231D0 (en) 1993-07-22 1993-09-08 York Ltd Optical time domain reflextometry
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
US5511086A (en) 1995-03-22 1996-04-23 The Texas A&M University System Low noise and narrow linewidth external cavity semiconductor laser for coherent frequency and time domain reflectometry
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
JP3402083B2 (ja) 1996-08-05 2003-04-28 Ｋｄｄｉ株式会社 光ファイバ線路の障害位置検出装置
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
DE19939853C2 (de) 1999-08-23 2003-03-13 Siemens Ag Add/Drop-Drop & Continue-Modul und Drop & Continue-Modul
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
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
WO2003014674A2 (en) 2001-08-10 2003-02-20 The Board Of Trustees Of The Leland Stanford Junior University Two delay coil sagnac-based sensor array
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
US20040208523A1 (en) 2002-01-30 2004-10-21 Tellabs Operations, Inc. Swept frequency reflectometry using an optical signal with sinusoidal modulation
US6813403B2 (en) 2002-03-14 2004-11-02 Fiber Optic Systems Technology, Inc. Monitoring of large structures using brillouin spectrum analysis
US6943872B2 (en) 2002-03-25 2005-09-13 Sumitomo Electric Industries, Ltd. Method for selection of optical fiber and system for inspection of optical fiber
US6775203B2 (en) 2002-07-18 2004-08-10 Input/Output, Inc. Seismic seabed cable with sensor units
JP4115205B2 (ja) 2002-08-23 2008-07-09 株式会社リコー ３次元形状表示方法、３次元形状表示装置、該方法を実行するプログラム及び記録媒体
GB0220914D0 (en) 2002-09-10 2002-10-23 Qinetiq Ltd Lidar apparatus and method
ES2294086T3 (es) 2002-12-16 2008-04-01 Aston Photonic Technologies Ltd. Sistema de interrogacion de una red de guias de onda opticas y sistema sensor.
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
GB2401738A (en) 2003-05-16 2004-11-17 Radiodetection Ltd Optical fibre sensor
US7006230B2 (en) 2003-05-16 2006-02-28 Lucent Technologies Inc. Interferometric method and apparatus for the characterization of optical pulses
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
US7536102B1 (en) 2004-03-25 2009-05-19 At&T Corp Method and apparatus for fiber optic fault locating and mapping
GB0407386D0 (en) 2004-03-31 2004-05-05 British Telecomm Monitoring a communications link
US20080274456A1 (en) * 2004-06-09 2008-11-06 Bruce Yankner Methods and Compositions for Modifying Gene Regulation and Dna Damage in Ageing
CA2571084A1 (en) 2004-06-15 2006-01-05 Optellios, Inc. Phase responsive optical fiber sensor
EP1788426B1 (de) 2004-08-30 2012-12-12 Mitsubishi Electric Corporation Optisches kommunikationssystem mit ramanverstärker
WO2006035198A1 (en) 2004-09-30 2006-04-06 British Telecommunications Public Limited Company Identifying or locating waveguides
GB0421747D0 (en) 2004-09-30 2004-11-03 British Telecomm Distributed backscattering
GB0427733D0 (en) 2004-12-17 2005-01-19 British Telecomm Optical system
ZA200705625B (en) 2005-01-11 2008-09-25 Future Fibre Tech Pty Ltd Apparatus and method for using a counter-propagating signal method for locating events
WO2006092606A1 (en) 2005-03-04 2006-09-08 British Telecommunications Public Limited Company Acousto-optical modulator arrangement
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
JP4768421B2 (ja) 2005-12-06 2011-09-07 富士通株式会社 Ｄｑｐｓｋ光受信器
EP1826924A1 (de) 2006-02-24 2007-08-29 BRITISH TELECOMMUNICATIONS public limited company Abtastung einer Störung
US7961331B2 (en) 2006-02-24 2011-06-14 British Telecommunications Public Limited Company Sensing a disturbance along an optical path
US8670662B2 (en) 2006-04-03 2014-03-11 British Telecommunications Public Limited Company Evaluating the position of an optical fiber disturbance

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KR20070095909A (ko) 2007-10-01
DE602005026439D1 (de) 2011-03-31
CA2589792A1 (en) 2006-06-22
WO2006064243A1 (en) 2006-06-22
US8045174B2 (en) 2011-10-25
JP2008524897A (ja) 2008-07-10
US20080123085A1 (en) 2008-05-29
JP4782798B2 (ja) 2011-09-28
EP1825613B1 (de) 2011-02-16
EP1825613A1 (de) 2007-08-29

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