FR2663480B1 - - Google Patents

Info

Publication number
FR2663480B1
FR2663480B1 FR9107154A FR9107154A FR2663480B1 FR 2663480 B1 FR2663480 B1 FR 2663480B1 FR 9107154 A FR9107154 A FR 9107154A FR 9107154 A FR9107154 A FR 9107154A FR 2663480 B1 FR2663480 B1 FR 2663480B1
Authority
FR
France
Prior art keywords
tone
amplifier
detected
distress
pump source
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 - Fee Related
Application number
FR9107154A
Other languages
English (en)
French (fr)
Other versions
FR2663480A1 (fr
Inventor
John Pettitt Martin
Anagnostis Hadjifotiou
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of FR2663480A1 publication Critical patent/FR2663480A1/fr
Application granted granted Critical
Publication of FR2663480B1 publication Critical patent/FR2663480B1/fr
Granted 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
    • H04B10/07—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
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0771—Fault location on the transmission path
    • 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
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0777—Monitoring line amplifier or line repeater equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/403—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local oscillators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/07—Monitoring an optical transmission system using a supervisory signal
    • H04B2210/075—Monitoring an optical transmission system using a supervisory signal using a pilot tone

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Alarm Systems (AREA)
FR9107154A 1990-06-16 1991-06-12 Procede et appareil de telemetrie analogique pour systeme de transmission optique. Granted FR2663480A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9013513A GB2245121B (en) 1990-06-16 1990-06-16 Telemetry

Publications (2)

Publication Number Publication Date
FR2663480A1 FR2663480A1 (fr) 1991-12-20
FR2663480B1 true FR2663480B1 (enExample) 1995-01-27

Family

ID=10677772

Family Applications (2)

Application Number Title Priority Date Filing Date
FR9107154A Granted FR2663480A1 (fr) 1990-06-16 1991-06-12 Procede et appareil de telemetrie analogique pour systeme de transmission optique.
FR9107307A Granted FR2664450A1 (fr) 1990-06-16 1991-06-14 Procede et installation de telemetrie analogique.

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR9107307A Granted FR2664450A1 (fr) 1990-06-16 1991-06-14 Procede et installation de telemetrie analogique.

Country Status (4)

Country Link
US (1) US5483233A (enExample)
JP (1) JP3150997B2 (enExample)
FR (2) FR2663480A1 (enExample)
GB (1) GB2245121B (enExample)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9008895D0 (en) * 1990-04-20 1990-06-20 British Telecomm Optical communications link fault signalling
JP2778438B2 (ja) * 1993-12-27 1998-07-23 日本電気株式会社 光増幅装置と光増幅器設計方法と光中継伝送システム
GB2326548B (en) * 1994-06-21 1999-03-10 Fujitsu Ltd Optical transmission apparatus
JPH088835A (ja) * 1994-06-21 1996-01-12 Fujitsu Ltd 光伝送方式
US5594748A (en) * 1995-08-10 1997-01-14 Telephone Information Systems, Inc. Method and apparatus for predicting semiconductor laser failure
GB2314224A (en) * 1996-06-11 1997-12-17 Stc Submarine Systems Ltd Fibre optic transmission
US5898801A (en) 1998-01-29 1999-04-27 Lockheed Martin Corporation Optical transport system
US6580530B1 (en) * 1998-05-29 2003-06-17 Cisco Photonics Italy S.R.L. Optical communication system
JP2004520702A (ja) * 2000-04-13 2004-07-08 シーメンス　アクチエンゲゼルシヤフト 増幅作用を有する媒体、例えば光ファイバ導波体を制御する方法および装置
US20020101874A1 (en) * 2000-11-21 2002-08-01 Whittaker G. Allan Physical layer transparent transport information encapsulation methods and systems
JP2002198598A (ja) * 2000-12-22 2002-07-12 Nec Corp 光増幅利得制御回路および光増幅利得制御方法
US6751014B2 (en) * 2001-06-19 2004-06-15 International Business Machines Corporation Automatic gain control and dynamic equalization of erbium doped optical amplifiers in wavelength multiplexing networks
US7190897B2 (en) * 2001-07-02 2007-03-13 Lucent Technologies Inc. Optical channel operating parameters monitoring
US7085497B2 (en) 2002-04-03 2006-08-01 Lockheed Martin Corporation Vehicular communication system
US20040076434A1 (en) * 2002-09-27 2004-04-22 Whittaker G. Allan Optical distribution network for RF and other analog signals
US6912339B2 (en) * 2002-09-27 2005-06-28 Lockheed Martin Corporation Optical interface devices having balanced amplification
US7283480B1 (en) 2002-11-12 2007-10-16 Lockheed Martin Corporation Network system health monitoring using cantor set signals
US7349629B1 (en) 2002-11-26 2008-03-25 Lockheed Martin Corporation Methods and systems for creating a digital interconnect fabric
US7570887B2 (en) * 2003-03-31 2009-08-04 Lockheed Martin Corporation Optical network interface systems and devices
US7424228B1 (en) 2003-03-31 2008-09-09 Lockheed Martin Corporation High dynamic range radio frequency to optical link
US7151895B2 (en) * 2003-08-26 2006-12-19 Fujitsu Limited Method and system for automatically setting gain for an amplifier in an optical network
US7440699B1 (en) 2004-06-28 2008-10-21 Lockheed Martin Corporation Systems, devices and methods for transmitting and receiving signals on an optical network

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211275B (de) * 1964-05-27 1966-02-24 Siemens Ag Anordnung zur Ortung von Fehlern in einer TF-UEbertragungsstrecke
JPS575447A (en) * 1980-06-13 1982-01-12 Toshiba Corp Failure detecting system
US4468773A (en) * 1981-05-29 1984-08-28 Seaton Norman T Laser control apparatus and method
NL8200002A (nl) * 1982-01-04 1983-08-01 Philips Nv Foutlocalisatie-inrichting voor digitaal optische transmissiesysteem.
EP0331304B1 (en) * 1988-03-04 1993-11-24 BRITISH TELECOMMUNICATIONS public limited company Amplification of optical signals
GB2230912B (en) * 1989-04-22 1993-10-20 Stc Plc Optical amplifier gain control
US5087108A (en) * 1989-08-11 1992-02-11 Societa' Cavi Pirelli S.P.A. Double-core active-fiber optical amplifier having a wide-band signal wavelength
JP3137632B2 (ja) * 1989-08-31 2001-02-26 富士通株式会社 光ファイバ増幅器を備えた光通信方式

Also Published As

Publication number Publication date
JPH04239236A (ja) 1992-08-27
FR2664450B1 (enExample) 1994-12-09
US5483233A (en) 1996-01-09
FR2664450A1 (fr) 1992-01-10
GB2245121B (en) 1994-03-16
GB9013513D0 (en) 1990-08-08
FR2663480A1 (fr) 1991-12-20
GB2245121A (en) 1991-12-18
JP3150997B2 (ja) 2001-03-26

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Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse

Effective date: 20080229