DK106891A - Tabsdetektion - Google Patents

Tabsdetektion Download PDF

Info

Publication number
DK106891A
DK106891A DK106891A DK106891A DK106891A DK 106891 A DK106891 A DK 106891A DK 106891 A DK106891 A DK 106891A DK 106891 A DK106891 A DK 106891A DK 106891 A DK106891 A DK 106891A
Authority
DK
Denmark
Prior art keywords
loss detection
loss
detection
Prior art date
Application number
DK106891A
Other languages
English (en)
Other versions
DK106891D0 (da
Inventor
Peter John Keeble
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
Application filed by British Telecomm filed Critical British Telecomm
Publication of DK106891D0 publication Critical patent/DK106891D0/da
Publication of DK106891A publication Critical patent/DK106891A/da

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
    • G01M11/3136—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR for testing of multiple fibers
    • 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]

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)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Glass Compositions (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
DK106891A 1988-12-06 1991-06-04 Tabsdetektion DK106891A (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888828408A GB8828408D0 (en) 1988-12-06 1988-12-06 Loss detector
PCT/GB1989/001454 WO1990006498A2 (en) 1988-12-06 1989-12-05 Loss detection

Publications (2)

Publication Number Publication Date
DK106891D0 DK106891D0 (da) 1991-06-04
DK106891A true DK106891A (da) 1991-06-04

Family

ID=10647997

Family Applications (1)

Application Number Title Priority Date Filing Date
DK106891A DK106891A (da) 1988-12-06 1991-06-04 Tabsdetektion

Country Status (12)

Country Link
US (1) US5187362A (da)
EP (1) EP0447439B1 (da)
JP (1) JP2856904B2 (da)
AU (1) AU617913B2 (da)
CA (1) CA2004674C (da)
DE (1) DE68910695T2 (da)
DK (1) DK106891A (da)
ES (1) ES2046775T3 (da)
GB (1) GB8828408D0 (da)
HK (1) HK135596A (da)
NZ (1) NZ231638A (da)
WO (1) WO1990006498A2 (da)

Families Citing this family (76)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9007974D0 (en) * 1990-04-09 1990-06-06 British Telecomm Loss detection
GB9022681D0 (en) * 1990-10-18 1990-11-28 British Telecomm Passive optical network
AU643115B2 (en) * 1991-06-03 1993-11-04 Sumiden Opcom Ltd. Method for farbicating optical fibre couplers
US5251001A (en) * 1991-11-18 1993-10-05 Teradyne, Inc. Reflected optical power fiber test system
GB9202564D0 (en) * 1992-02-07 1992-03-25 Marconi Gec Ltd Optical signal transmission network
DE69328294T2 (de) * 1992-02-07 2000-12-28 Marconi Comm Ltd Optisches ubertragungsnetzwerk
US5506674A (en) * 1992-05-01 1996-04-09 Sumitomo Electric Industries, Ltd. Method for identifying an optical fiber using a pattern of reflected light
SE518622C2 (sv) * 1992-07-03 2002-10-29 Ericsson Telefon Ab L M Förfarande och anordning för övervakning av förgrenade optiska ledningsnät
JPH06117961A (ja) * 1992-10-05 1994-04-28 Furukawa Electric Co Ltd:The 光線路監視方法
US5383015A (en) * 1992-12-22 1995-01-17 At&T Corp. Optical time domain reflectometry measurements on a multi-branch optical network using multiwavelength pass filters
JP3211453B2 (ja) * 1993-01-29 2001-09-25 安藤電気株式会社 光分岐を含む光線路の減衰量測定方法
GB2274753B (en) * 1993-01-29 1997-06-25 Marconi Gec Ltd Optical signal transmission network
US5808761A (en) * 1993-07-15 1998-09-15 Gec-Marconi Limited Path integrity proving in optical communications systems
GB2280326B (en) * 1993-07-15 1997-04-23 Marconi Gec Ltd Optical communication systems
GB9317576D0 (en) * 1993-08-24 1993-10-06 British Aerospace Fibre optic damage detection system
SE503740C2 (sv) * 1994-04-22 1996-08-19 Ericsson Telefon Ab L M Optisk fiber innefattande en reflektor samt sätt att framställa en reflektor i en optisk fiber
GB2292495B (en) * 1994-08-17 1998-03-25 Northern Telecom Ltd Fault location in optical communication systems
US5557400A (en) * 1995-02-15 1996-09-17 Hewlett-Packard Company Multiplexed sensing using optical coherence reflectrometry
GB9506163D0 (en) * 1995-03-27 1995-05-17 Bicc Plc Optical fibre and network
FR2739992B1 (fr) * 1995-10-11 1997-11-14 Gay Philippe Systeme de surveillance, par echometrie, d'un reseau de telecommunication optique en exploitation, a l'aide de reseaux de bragg
GB9526582D0 (en) * 1995-12-28 1996-02-28 Bicc Plc Optical line system
JP3411436B2 (ja) * 1996-01-12 2003-06-03 Ｋｄｄｉ株式会社 光通信線路の監視方法
JP3224344B2 (ja) * 1996-06-10 2001-10-29 安藤電気株式会社 多分岐光線路試験装置
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
US5767957A (en) * 1996-12-04 1998-06-16 International Business Machines Corporation Testing an optical cable having multiple fibers by the application of a light pulse to all fibers through optical jumpers of incrementally varying lengths
JP3439323B2 (ja) 1997-06-18 2003-08-25 安藤電気株式会社 多段多分岐光線路の試験装置
EP0936457B1 (en) * 1998-02-16 2000-12-20 Hewlett-Packard Company Localization of faults in fiber optic systems
DE69941839D1 (de) * 1998-02-23 2010-02-04 Sumitomo Electric Industries System und verfahren zur überwachung einer verzweigungsleitung
DE19808601A1 (de) * 1998-02-28 1999-09-09 Deutsche Telekom Ag Messverfahren für Einzelfasern von Kabeln
DE59800423D1 (de) * 1998-07-09 2001-02-08 Wandel & Goltermann Man Holdin Verfahren zur Dämpfungsmessung in digitalen Übertragungsleitungen
JP4055306B2 (ja) * 1999-11-08 2008-03-05 富士通株式会社 伝送路の障害検出装置及び方法
FR2844051B1 (fr) * 2002-08-30 2004-11-12 Nexans Systeme pour le controle par reflectometrie dans le domaine temporel (otdr) d'un reseau optique
EP1462788A1 (en) * 2003-03-28 2004-09-29 Agilent Technologies Inc. a Delaware Corporation Bidirectional optical loss measurement
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
KR100593607B1 (ko) * 2004-05-13 2006-06-28 학교법인 동국대학교 강유전 반도체 물질을 포함하는 비휘발성 반도체 메모리소자 및 그 반도체 메모리 소자의 데이터 기입, 소거 및판독 방법
US7280189B2 (en) * 2004-07-08 2007-10-09 Weller Whitney T Method and apparatus for testing optical fiber based networks
US20060007426A1 (en) * 2004-07-08 2006-01-12 Weller Whitney T Novel Algorithm, Method and apparatus for In-Service Testing of Passive Optical Networks (PON) and Fiber to the Premise (FTTP) Networks
US7493040B1 (en) * 2004-07-15 2009-02-17 Nortel Networks Limited Method and apparatus for securing fiber in an optical network
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
ATE498954T1 (de) 2004-12-17 2011-03-15 British Telecomm Netzwerkbeurteilung
TWI255618B (en) 2005-01-26 2006-05-21 Ind Tech Res Inst Apparatus and method of optical fiber condition monitoring in optical networks
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 (en) 2005-03-31 2006-10-04 British Telecommunications Public Limited Company Communicating information
WO2006109693A1 (ja) * 2005-04-08 2006-10-19 Eisai R & D Management Co., Ltd. 粘性試料のサンプリング器具、喀痰の均質化処理方法及び微生物の検出方法
EP1713301A1 (en) * 2005-04-14 2006-10-18 BRITISH TELECOMMUNICATIONS public limited company Method and apparatus for communicating sound over an optical link
EP1729096A1 (en) * 2005-06-02 2006-12-06 BRITISH TELECOMMUNICATIONS public limited company Method and apparatus for determining the position of a disturbance in an optical fibre
GB0514680D0 (en) * 2005-07-16 2005-08-24 Tyco Electronics Raychem Nv PCB optical network monitor
FR2889741B1 (fr) * 2005-08-09 2007-09-28 Nexans Sa Systeme de determination et de localisation de defauts par reflectometrie dans un reseau optique
US20070154215A1 (en) * 2006-01-05 2007-07-05 Tellabs Bedford, Inc. Method and apparatus for detecting optical reflections in an optical network
WO2007096579A1 (en) * 2006-02-24 2007-08-30 British Telecommunications Public Limited Company Sensing a disturbance
EP1826924A1 (en) * 2006-02-24 2007-08-29 BRITISH TELECOMMUNICATIONS public limited company Sensing a disturbance
WO2007096578A1 (en) * 2006-02-24 2007-08-30 British Telecommunications Public Limited Company Sensing a disturbance
CN101410696B (zh) * 2006-04-03 2011-01-05 英国电讯有限公司 干扰位置的估计
JP2011518523A (ja) * 2008-04-21 2011-06-23 オプリンク コミュニケーションズ， インコーポレイテッド ファイバネットワーク監視
KR101587091B1 (ko) 2008-10-17 2016-01-20 엑스포 아이엔씨. 2-파장 광통신 계측기와 파장 의존형 반사 소자를 이용하여 광통신망에서 광선로의 파라미터를 추출하는 방법 및 장치
GB0823688D0 (en) * 2008-12-31 2009-02-04 Tyco Electronics Raychem Nv Unidirectional absolute optical attenuation measurement with OTDR
JP2010185762A (ja) * 2009-02-12 2010-08-26 Sumitomo Electric Ind Ltd 光線路監視システム
CN102118658B (zh) * 2009-12-31 2014-02-19 华为技术有限公司 分光器端口识别的方法和装置
IL206723A0 (en) * 2010-06-30 2010-12-30 Eci Telecom Ltd Technology for fault allocation in passive optical networks (pon)
GB2499386A (en) * 2012-02-10 2013-08-21 United Technologists Europe Ltd OTDR Mapping Method using an optical reflector at a specific customer fibre end to increase the amplitude relative to other reflection events in the trace
CN102721646B (zh) * 2012-06-28 2014-06-25 中国计量学院 远距离挥发性有机物多点检测传感装置
CN102868447B (zh) * 2012-09-24 2015-07-15 深圳太辰光通信股份有限公司 一种光纤光栅追踪器与光纤线路故障检测方法
JP6085573B2 (ja) * 2014-01-14 2017-02-22 日本電信電話株式会社 分岐光線路の特性解析装置および分岐光線路の特性解析方法
EP3100377B1 (en) * 2014-01-31 2019-10-16 AFL Telecommunications LLC Mapping of long high loss fiber spans
AT515815B1 (de) * 2014-06-12 2017-05-15 Fachhochschule Technikum Wien Verfahren und Vorrichtung zur Detektion von Abhörversuchen bei optischer Freiraum Datenübertragung
CN104113373A (zh) * 2014-07-22 2014-10-22 桂林聚联科技有限公司 一种判断光纤连接点状态的方法
US9240836B1 (en) * 2014-08-08 2016-01-19 Verizon Patent And Licensing Inc. OTDR fault tracing in optical networks
JP5811259B2 (ja) * 2014-12-24 2015-11-11 住友電気工業株式会社 光線路監視システム
US11047766B2 (en) * 2018-04-11 2021-06-29 Afl Telecommunications Llc Systems and methods for identification and testing of optical fibers
CN112491465A (zh) * 2019-08-23 2021-03-12 中兴通讯股份有限公司 光纤线路检测控制方法、装置、设备及可读存储介质
US20230084406A1 (en) * 2021-09-14 2023-03-16 Viavi Solutions Inc. Fiber element offset length-based optical reflector peak analysis

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2620357A1 (de) * 1976-05-06 1977-11-17 Aeg Telefunken Kabelwerke Daempfungsmessung in lichtleitern
JPS54113351A (en) * 1978-02-23 1979-09-04 Sumitomo Electric Ind Ltd Measurement of transmission loss of optical fibers
GB2136113B (en) * 1983-03-05 1986-08-06 Plessey Co Plc Improvements relating to optical sensing systems
GB8311256D0 (en) * 1983-04-26 1983-06-02 Central Electr Generat Board Measuring external parameter
DK155238C (da) * 1985-09-06 1989-07-10 Nordiske Kabel Traad Fremgangsmaade ved signalbehandling af reflekteredeimpulser samt apparatur til udoevelse af fremgangsmaaden
GB8525413D0 (en) * 1985-10-15 1985-11-20 Plessey Co Plc Optical communications system
FR2597986B1 (fr) * 1986-04-28 1990-09-21 Foucault Marc Dispositif a coupleur optique, pour calibrer ou etalonner un reflectometre, systeme d'echometrie et procedes de caracterisation d'un coupleur et de mesure d'attenuations utilisant ce dispositif
JP2515018B2 (ja) * 1989-06-12 1996-07-10 国際電信電話株式会社 後方散乱光測定方式及びその装置

Also Published As

Publication number Publication date
DK106891D0 (da) 1991-06-04
HK135596A (en) 1996-08-02
US5187362A (en) 1993-02-16
CA2004674C (en) 1997-03-04
WO1990006498A2 (en) 1990-06-14
ES2046775T3 (es) 1994-02-01
AU4751090A (en) 1990-06-26
EP0447439B1 (en) 1993-11-10
GB8828408D0 (en) 1989-01-05
CA2004674A1 (en) 1990-06-06
WO1990006498A3 (en) 1990-09-07
AU617913B2 (en) 1991-12-05
DE68910695D1 (de) 1993-12-16
EP0447439A1 (en) 1991-09-25
NZ231638A (en) 1992-02-25
JP2856904B2 (ja) 1999-02-10
JPH04502210A (ja) 1992-04-16
DE68910695T2 (de) 1994-05-05

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Legal Events

Date Code Title Description
AHS Application shelved for other reasons than non-payment