ES2075052T3 - Metodos y sistemas para deteccion de fibras opticas. - Google Patents

Metodos y sistemas para deteccion de fibras opticas.

Info

Publication number
ES2075052T3
ES2075052T3 ES89308620T ES89308620T ES2075052T3 ES 2075052 T3 ES2075052 T3 ES 2075052T3 ES 89308620 T ES89308620 T ES 89308620T ES 89308620 T ES89308620 T ES 89308620T ES 2075052 T3 ES2075052 T3 ES 2075052T3
Authority
ES
Spain
Prior art keywords
fiber optic
divider
lights
fiber
detector
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
ES89308620T
Other languages
English (en)
Inventor
Lawrence Russell Dunn
Ian Arthur White
Willard Chandler White Iii
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.)
AT&T Corp
Original Assignee
AT&T Corp
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 AT&T Corp filed Critical AT&T Corp
Application granted granted Critical
Publication of ES2075052T3 publication Critical patent/ES2075052T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection 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
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/85—Protection from unauthorised access, e.g. eavesdrop protection
    • 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
    • G01M11/08—Testing mechanical properties
    • G01M11/083—Testing mechanical properties by using an optical fiber in contact with the device under test [DUT]
    • 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
    • G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
    • G01M11/331—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face by using interferometer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4469—Security aspects
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)
  • Optical Communication System (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

UN SISTEMA SENSOR DE FIBRA OPTICA PARA DETECTAR INTRUSIONES DE FIBRA OPTICA O DE CABLES DE FIBRA OPTICA INCLUYE UN DISPOSITIVO INTERFEROMETRICO. DOS LUMBRERAS (28, 30) DE UN DIVISOR (25) SE CONECTAN A UNA FUENTE (26) DE ENERGIA OPTICA TAL COMO UN LASER, POR EJEMPLO, Y A UN DETECTOR (32). LAS OTRAS DOS LUMBRERAS (46, 48) SE CONECTAN A LOS EXTREMOS DE UNA LONGITUD (50) DE FIBRA OPTICA PARA EL CONTROL. UNA SEÑAL DE ENTRADA AL DIVISOR SE DIVIDE DIRIGIENDOSE UNA SUBSEÑAL EN UNA DIRECCION ALREDEDOR DE LA LONGITUD DE FIBRA OPTICA QUE SIRVE DE VIA COMUN ENTRE LAS DOS LUMBRERAS. LA OTRA SEÑAL VIAJA ALREDEDOR DEL RECORRIDO COMUN PERO EN SENTIDO OPUESTO. LAS SEÑALES PARTIDAS SE RECOMBINAN EN EL DIVISOR Y SU DIFERENCIA DE FASE SE MIDE A MODO DE PATRON DETECTABLE POR EL DETECTOR. SI HUBIERA INTRUSION DE LA FIBRA OPTICA O DEL CABLE QUE CONTIENE LA FIBRA OPTICA DE CONTROL, EL PATRON DETECTADO CAMBIARA EN UNA FORMA SIGNIFICATIVA.
ES89308620T 1988-08-31 1989-08-24 Metodos y sistemas para deteccion de fibras opticas. Expired - Lifetime ES2075052T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/238,810 US4904050A (en) 1988-08-31 1988-08-31 Methods of and systems for optical fiber sensing

Publications (1)

Publication Number Publication Date
ES2075052T3 true ES2075052T3 (es) 1995-10-01

Family

ID=22899406

Family Applications (1)

Application Number Title Priority Date Filing Date
ES89308620T Expired - Lifetime ES2075052T3 (es) 1988-08-31 1989-08-24 Metodos y sistemas para deteccion de fibras opticas.

Country Status (11)

Country Link
US (1) US4904050A (es)
EP (1) EP0364093B1 (es)
JP (1) JPH06103857B2 (es)
KR (1) KR0139547B1 (es)
AU (1) AU598718B2 (es)
CA (1) CA1316235C (es)
DE (1) DE68923671T2 (es)
DK (1) DK427189A (es)
ES (1) ES2075052T3 (es)
HK (1) HK34096A (es)
IL (1) IL91463A (es)

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US5311592A (en) * 1986-06-11 1994-05-10 Mcdonnell Douglas Corporation Sagnac interferometer based secure communication system
GB8728854D0 (en) * 1987-12-10 1988-01-27 British Telecomm Optical device
GB8805844D0 (en) * 1988-03-11 1988-04-13 British Telecomm Detection of stress applied to optical fibre
DE4037077A1 (de) * 1990-11-22 1992-05-27 Hilti Ag Verfahren und einrichtung zur faseroptischen kraftmessung
US5144689A (en) * 1991-07-30 1992-09-01 Fiber Sensys, Inc. Multimode fiber sensor system with sensor fiber coupled to a detection fiber by spacer means
US5355208A (en) * 1992-06-24 1994-10-11 Mason & Hanger National, Inc. Distributed fiber optic sensor for locating and identifying remote disturbances
US5414785A (en) * 1993-09-13 1995-05-09 At&T Corp. Optical data bus having collision detection capability
US5699176A (en) * 1995-11-06 1997-12-16 Lucent Technologies Inc. Upgradable fiber-coax network
US5567933A (en) * 1995-02-14 1996-10-22 Mason & Hanger National, Inc. Optical fiber detection system with disturbance and positive cut-loop detection capabilities
FR2756053B1 (fr) * 1996-11-21 1999-01-29 Quantel Dispositif de detection de dommage dans une fibre optique
US5778114A (en) * 1997-04-18 1998-07-07 Eslambolchi; Hossein Fiber analysis method and apparatus
US5991013A (en) * 1998-10-27 1999-11-23 At&T Corp. Conveyance warning member with sacrificial fiber
US6148123A (en) * 1999-03-17 2000-11-14 At&T Corp Method and apparatus for measuring optical distances
DE60134154D1 (de) * 2000-09-05 2008-07-03 Fieldturf Tarkett Inc Gestaltung von umgebenden Oberflächen einer Landebahn
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
NL1024456C2 (nl) * 2003-10-06 2005-04-07 Lightspeed Inv S B V Signaalleiding, hekwerk en werkwijze voor het vervaardigen van een hekwerk.
GB0407386D0 (en) 2004-03-31 2004-05-05 British Telecomm Monitoring a communications link
US20050244116A1 (en) * 2004-04-28 2005-11-03 Evans Alan F Cables and cable installations
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
US20060071770A1 (en) * 2004-10-04 2006-04-06 Frank Giotto Fiber optic cable sensor for movable objects
GB0427733D0 (en) 2004-12-17 2005-01-19 British Telecomm Optical system
ATE498954T1 (de) 2004-12-17 2011-03-15 British Telecomm Netzwerkbeurteilung
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 (en) 2005-03-31 2006-10-04 British Telecommunications Public Limited Company Communicating information
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
EP1826924A1 (en) 2006-02-24 2007-08-29 BRITISH TELECOMMUNICATIONS public limited company Sensing a disturbance
WO2007096579A1 (en) 2006-02-24 2007-08-30 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
CA2667360A1 (en) * 2006-10-23 2008-08-21 Fieldturf Tarkett Inc. Aircraft arrestor system and method of decelerating an aircraft
GB2443661B (en) * 2006-11-08 2011-08-31 Polarmetrix Ltd Detecting a disturbance in the phase of light propogating in an optical waveguide
US9784642B2 (en) 2008-09-23 2017-10-10 Onesubsea Ip Uk Limited Redundant optical fiber system and method for remotely monitoring the condition of a pipeline
US8593621B2 (en) 2010-04-30 2013-11-26 International Business Machines Corporation Testing an optical fiber connection
CN102332197B (zh) * 2011-08-18 2013-10-09 黄力华 一种高精度光学安全保卫系统
US20130243367A1 (en) * 2012-03-16 2013-09-19 William Redvers Belisle Fiber Optic Turf Blade Contact and Movement Sensor
CN103617685B (zh) * 2013-12-09 2016-02-24 中国船舶重工集团公司第七〇五研究所 一种基于光纤振动传感报警系统的自学习算法
CN106051468A (zh) * 2016-06-08 2016-10-26 无锡亚天光电科技有限公司 一种分布式光纤管道安全预警系统的报警模式分析算法
KR101861321B1 (ko) * 2018-01-22 2018-05-28 주식회사 두리번테크 듀얼 펄스를 이용한 비상상황 모니터링 시스템
US11018778B1 (en) 2020-05-20 2021-05-25 Verizon Patent And Licensing Inc. System and method to prevent unauthorized voice detection via fiber links
US11611393B1 (en) * 2021-09-08 2023-03-21 Subcom, Llc Spatially resolved monitoring of cable perturbations using multichannel information

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Publication number Priority date Publication date Assignee Title
US4342907A (en) * 1977-12-12 1982-08-03 Pedro B. Macedo Optical sensing apparatus and method
AU525304B2 (en) * 1978-06-13 1982-10-28 Amalgamated Wireless (Australasia) Limited Optical fibre communication links
US4299490A (en) * 1978-12-07 1981-11-10 Mcdonnell Douglas Corporation Phase nulling optical gyro
EP0049979B1 (en) * 1980-10-10 1987-03-18 Pilkington P.E. Limited Intruder detection security system
US4375680A (en) * 1981-01-16 1983-03-01 Mcdonnell Douglas Corporation Optical acoustic sensor
US4775214A (en) * 1983-12-21 1988-10-04 Rosemount Inc. Wavelength coded resonant optical sensor
DK155238C (da) * 1985-09-06 1989-07-10 Nordiske Kabel Traad Fremgangsmaade ved signalbehandling af reflekteredeimpulser samt apparatur til udoevelse af fremgangsmaaden
US4775216A (en) * 1987-02-02 1988-10-04 Litton Systems, Inc. Fiber optic sensor array and method
GB8709900D0 (en) * 1987-04-27 1987-08-05 British Telecomm Surveillance system

Also Published As

Publication number Publication date
AU598718B2 (en) 1990-06-28
EP0364093B1 (en) 1995-08-02
CA1316235C (en) 1993-04-13
HK34096A (en) 1996-03-08
DE68923671D1 (de) 1995-09-07
DK427189A (da) 1990-03-01
DK427189D0 (da) 1989-08-30
US4904050B1 (es) 1992-07-28
DE68923671T2 (de) 1996-01-18
KR0139547B1 (en) 1998-07-01
AU4090689A (en) 1990-03-08
KR900003653A (ko) 1990-03-26
IL91463A0 (en) 1990-04-29
JPH02119329A (ja) 1990-05-07
IL91463A (en) 1994-05-30
EP0364093A3 (en) 1991-04-24
US4904050A (en) 1990-02-27
EP0364093A2 (en) 1990-04-18
JPH06103857B2 (ja) 1994-12-14

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