CS277497B6 - Optical telecommunication line - Google Patents

Optical telecommunication line Download PDF

Info

Publication number
CS277497B6
CS277497B6 CS903573A CS357390A CS277497B6 CS 277497 B6 CS277497 B6 CS 277497B6 CS 903573 A CS903573 A CS 903573A CS 357390 A CS357390 A CS 357390A CS 277497 B6 CS277497 B6 CS 277497B6
Authority
CS
Czechoslovakia
Prior art keywords
optical
optical fiber
amplifier
signals
pumping
Prior art date
Application number
CS903573A
Other languages
Czech (cs)
English (en)
Inventor
Giorgio Grasso
Aldo Righetti
Flavio Fontana
Original Assignee
Pirelli Cavi Spa
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 Pirelli Cavi Spa filed Critical Pirelli Cavi Spa
Publication of CZ357390A3 publication Critical patent/CZ357390A3/cs
Publication of CS277497B6 publication Critical patent/CS277497B6/cs

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
    • H04B10/29—Repeaters
    • 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/2931—Signal power control using AGC
    • 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
    • H04B10/07—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
    • H04B10/0775—Performance monitoring and measurement of transmission parameters
    • 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
    • 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/2912—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06754—Fibre amplifiers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/09408—Pump redundancy
    • 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
    • H04B2210/071—Monitoring an optical transmission system using a supervisory signal using alarms
    • 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
    • H04B2210/074—Monitoring an optical transmission system using a supervisory signal using a superposed, over-modulated signal
    • 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)
  • Lasers (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Light Guides In General And Applications Therefor (AREA)
CS903573A 1989-07-21 1990-07-18 Optical telecommunication line CS277497B6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8921258A IT1231379B (it) 1989-07-21 1989-07-21 Linea di telecomunicazioni a fibre ottiche incorporante amplificatori dei segnali trasmessi ed amplificatori per detta linea

Publications (2)

Publication Number Publication Date
CZ357390A3 CZ357390A3 (en) 1993-02-17
CS277497B6 true CS277497B6 (en) 1993-03-17

Family

ID=11179153

Family Applications (1)

Application Number Title Priority Date Filing Date
CS903573A CS277497B6 (en) 1989-07-21 1990-07-18 Optical telecommunication line

Country Status (25)

Country Link
US (1) US5054876A (it)
EP (2) EP0408905B1 (it)
JP (3) JP3031480B2 (it)
KR (1) KR0155371B1 (it)
CN (1) CN1022531C (it)
AR (1) AR243711A1 (it)
AT (2) ATE198394T1 (it)
AU (1) AU622597B2 (it)
BR (1) BR9003652A (it)
CA (1) CA2021706C (it)
CS (1) CS277497B6 (it)
DD (1) DD299205A5 (it)
DE (2) DE69033678T2 (it)
ES (2) ES2102356T3 (it)
FI (1) FI903681A0 (it)
HK (1) HK1000358A1 (it)
HU (1) HU211280B (it)
ID (1) ID18627A (it)
IE (1) IE79238B1 (it)
IT (1) IT1231379B (it)
NO (2) NO303998B1 (it)
NZ (1) NZ234255A (it)
PE (1) PE34690A1 (it)
PL (1) PL164809B1 (it)
PT (1) PT94781B (it)

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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
GB8928237D0 (en) * 1989-12-14 1990-02-21 British Telecomm Lossless optical component
GB2251148B (en) * 1990-09-18 1995-04-12 Fujitsu Ltd Optical repeater having loop-back function
JPH04217123A (ja) * 1990-12-18 1992-08-07 Fujitsu Ltd 光伝送システムの給電方式
US5499135A (en) * 1990-12-24 1996-03-12 Alcatel N.V. Optical amplifier
DE4106778A1 (de) * 1991-03-04 1992-09-10 Standard Elektrik Lorenz Ag Optisch-elektrisch-wandler mit erweitertem dynamikbereich
US5268786A (en) * 1991-03-15 1993-12-07 Mitsubishi Denki Kabushiki Kaisha Optical fiber amplifier and its amplification method
IT1247844B (it) * 1991-03-29 1995-01-02 Pirelli Cavi S P A Dir Proprie Linea di telecomunicazione a fibre ottiche con amplificatori ottici, dotata di mezzi di protezione in grado di interrompere l'emissione luminosa in tutta la linea in presenza di un'interruzione della fibra ottica e di riattivarla automaticamente al ripristino della sua continuita'
JP2806092B2 (ja) * 1991-08-28 1998-09-30 日本電気株式会社 光増幅器
JP2725109B2 (ja) * 1992-03-06 1998-03-09 富士通株式会社 光増幅装置
DE4215338A1 (de) * 1992-05-09 1993-11-11 Sel Alcatel Ag Optisches Nachrichtenübertragungssystem mit Überwachungsvorrichtung zur Vermeidung von Riesenimpulsen
DE4218779C2 (de) * 1992-06-06 1997-04-03 Heinrich Zehnder Gmbh Vorrichtung zur optischen Informationsübertragung zwischen mehreren miteinander zu verbindenden Geräten
DE4222270B4 (de) * 1992-07-07 2007-09-13 Ericsson Ab Optische Verstärkerschaltung
US5278404A (en) * 1992-07-20 1994-01-11 At&T Bell Laboratories Optical sub-system utilizing an embedded micro-controller
US5241414A (en) * 1992-08-21 1993-08-31 At&T Bell Laboratories Fault tolerant optical amplifier arrangement
DE4315846A1 (de) * 1993-03-30 1994-10-06 Sel Alcatel Ag Faseroptischer Verstärker
JPH0816761B2 (ja) * 1993-04-13 1996-02-21 日本電気株式会社 光増幅器制御回路
US5408356A (en) * 1993-08-02 1995-04-18 The United States Of America As Represented By The United States Department Of Energy Fiber optic signal amplifier using thermoelectric power generation
JPH07176813A (ja) * 1993-12-17 1995-07-14 Fujitsu Ltd 光ファイバ増幅器
CN1055584C (zh) * 1994-12-27 2000-08-16 西安电子科技大学 双层微带线光导超短电脉冲产生器
JP3306693B2 (ja) * 1995-01-19 2002-07-24 富士通株式会社 光増幅装置，光波長多重通信システム，光端局装置及び光中継装置
US5563731A (en) * 1995-02-22 1996-10-08 Nec Corporation Monitor control signal receiving apparatus for optical fiber amplifier
US5532864A (en) * 1995-06-01 1996-07-02 Ciena Corporation Optical monitoring channel for wavelength division multiplexed optical communication system
US5710846A (en) * 1996-03-26 1998-01-20 Rf Systems, Inc. Self-calibrating optical fiber switch
US6580530B1 (en) 1998-05-29 2003-06-17 Cisco Photonics Italy S.R.L. Optical communication system
JP4576756B2 (ja) * 2001-06-19 2010-11-10 株式会社日立製作所 光信号切替え装置、および、その使用方法
DE10303314A1 (de) * 2003-01-28 2004-07-29 Marconi Communications Gmbh Ausgangsstufe für die WDM-Nachrichtenübertragung und Verfahren zum Austauschen von Fülllichtquellen in einer solchen Ausgangsstufe
US7158289B1 (en) 2003-11-07 2007-01-02 Alcatel Method and apparatus for implementing optical supervisory channel using broadband noise modulation
US7667889B2 (en) * 2007-02-21 2010-02-23 Pyrophotonics Lasers Inc. Methods and systems for gain control in pulsed optical amplifiers
JP5050931B2 (ja) 2008-03-04 2012-10-17 日本電気株式会社 光伝送システム、光伝送システムで用いられる光送受信装置、及び端末側送受信装置、並びに光伝送方法
JP2010177346A (ja) * 2009-01-28 2010-08-12 Nippon Telegr & Teleph Corp <Ntt> 光増幅器及び光増幅方法
US8964801B2 (en) * 2009-06-11 2015-02-24 Esi-Pyrophotonics Lasers, Inc. Method and system for stable and tunable high power pulsed laser system
KR101945622B1 (ko) 2017-06-29 2019-04-17 동서대학교 산학협력단 자율보행보조기 동작방법
EP3763064A1 (en) * 2018-03-06 2021-01-13 Neptune Subsea IP Limited Improved repeater powering

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3317541A1 (de) * 1983-05-13 1984-11-15 Siemens AG, 1000 Berlin und 8000 München Koppeleinrichtung fuer einen lichtwellenleiter
SE438396B (sv) * 1983-09-01 1985-04-15 Ericsson Telefon Ab L M Anordning for att detektera avtappning av ljusenergi fran optiska fibrer
GB2152297B (en) * 1984-01-19 1988-10-19 Stc Plc Optical repeaters
JPS6175326A (ja) * 1984-09-21 1986-04-17 Nec Corp フアイバ内光増幅送信装置
US4815804A (en) * 1985-02-08 1989-03-28 The Board Of Trustees Of The Leland Stanford Junior University In-line fiber optic memory and method of using same
US4699452A (en) * 1985-10-28 1987-10-13 American Telephone And Telegraph Company, At&T Bell Laboratories Optical communications system comprising Raman amplification means
DD246214A1 (de) * 1986-02-21 1987-05-27 Mikroelektronik Zt Forsch Tech Verfahren zur organisation des datenverkehrs lichtleitergekoppelter und mikrorechnergesteuerter technologischer module
GB8612955D0 (en) * 1986-05-28 1986-07-02 British Telecomm Optically controlled selector
GB8708148D0 (en) * 1987-04-06 1987-05-13 British Telecomm Radiation pulse generation
DE3885389T2 (de) * 1987-09-01 1994-03-24 Nec Corp Optischer Zwischenverstärker.

Also Published As

Publication number Publication date
PT94781B (pt) 1998-04-30
JP2000004200A (ja) 2000-01-07
ID18627A (id) 1998-04-30
AU5802990A (en) 1991-01-24
NO303998B1 (no) 1998-10-05
BR9003652A (pt) 1991-08-27
IE79238B1 (en) 1998-04-22
EP0742650B1 (en) 2000-12-27
ES2102356T3 (es) 1997-08-01
DE69030285D1 (de) 1997-04-30
FI903681A0 (fi) 1990-07-20
KR910003417A (ko) 1991-02-27
ATE150920T1 (de) 1997-04-15
US5054876A (en) 1991-10-08
JP3113244B2 (ja) 2000-11-27
ES2154780T3 (es) 2001-04-16
CA2021706A1 (en) 1991-01-22
NO982208L (no) 1991-01-22
HK1000358A1 (en) 1998-03-06
DD299205A5 (de) 1992-04-02
JPH0383427A (ja) 1991-04-09
CN1058500A (zh) 1992-02-05
PT94781A (pt) 1992-03-31
DE69030285T2 (de) 1997-10-09
NO903260D0 (no) 1990-07-20
NZ234255A (en) 1992-11-25
ATE198394T1 (de) 2001-01-15
CN1022531C (zh) 1993-10-20
HU211280B (en) 1995-11-28
EP0408905A2 (en) 1991-01-23
HU904558D0 (en) 1990-12-28
CZ357390A3 (en) 1993-02-17
IE902654A1 (en) 1991-02-27
CA2021706C (en) 1995-11-21
JP3031480B2 (ja) 2000-04-10
NO903260L (no) 1991-01-22
AU622597B2 (en) 1992-04-09
DE69033678D1 (de) 2001-02-01
PL164809B1 (pl) 1994-10-31
NO982208D0 (no) 1998-05-14
EP0742650A1 (en) 1996-11-13
JP2001044939A (ja) 2001-02-16
HUT54262A (en) 1991-01-28
DE69033678T2 (de) 2001-05-23
PE34690A1 (es) 1991-01-16
IT8921258A0 (it) 1989-07-21
IT1231379B (it) 1991-12-02
EP0408905B1 (en) 1997-03-26
PL286131A1 (en) 1991-04-08
EP0408905A3 (en) 1992-07-08
AR243711A1 (es) 1993-08-31
KR0155371B1 (ko) 1998-11-16

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Legal Events

Date Code Title Description
IF00 In force as of 2000-06-30 in czech republic
MM4A Patent lapsed due to non-payment of fee

Effective date: 20030718