CA2057881A1 - Reseaux optiques - Google Patents

Reseaux optiques

Info

Publication number
CA2057881A1
CA2057881A1 CA2057881A CA2057881A CA2057881A1 CA 2057881 A1 CA2057881 A1 CA 2057881A1 CA 2057881 A CA2057881 A CA 2057881A CA 2057881 A CA2057881 A CA 2057881A CA 2057881 A1 CA2057881 A1 CA 2057881A1
Authority
CA
Canada
Prior art keywords
pct
modulator
date nov
sec
frequencies
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.)
Granted
Application number
CA2057881A
Other languages
English (en)
Other versions
CA2057881C (fr
Inventor
David Wynford Faulkner
Andrew Robert John Cook
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.)
British Telecommunications PLC
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2057881A1 publication Critical patent/CA2057881A1/fr
Application granted granted Critical
Publication of CA2057881C publication Critical patent/CA2057881C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Glass Compositions (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Un système de diffusion des signaux HDTV par une station de tête (1) à un nombre de stations de consommateur (3) comprend une source optique de tête dont la fréquence est f0 et un modulateur (5) monté afin de recevoir la lumière d'une seule source optique (4). Le modulateur (5) module la lumière avec un multiplexeur de sous-porteuses à n voies, où n est un entier supérieur à 2, le n voies ayant les fréquences f1, f2... fn. Les fréquences sont distinctes dans l'espace de fréquences l'une de l'autre et de f0. Un réseau optique à branches passives de large bande (2) est connecté à la sortie du modulateur (5) et monté pour diffuser le signal modulé de la station de tête (1) à plusieurs stations de consommateur (3) chacune ayant un récepteur hétérodyne cohérent (7, 8, 9, 16).
CA002057881A 1989-05-25 1990-05-25 Reseaux optiques Expired - Lifetime CA2057881C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8912012.5 1989-05-25
GB898912012A GB8912012D0 (en) 1989-05-25 1989-05-25 Optical networks

Publications (2)

Publication Number Publication Date
CA2057881A1 true CA2057881A1 (fr) 1990-11-26
CA2057881C CA2057881C (fr) 1998-04-28

Family

ID=10657315

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002057881A Expired - Lifetime CA2057881C (fr) 1989-05-25 1990-05-25 Reseaux optiques

Country Status (9)

Country Link
US (1) US5272556A (fr)
EP (1) EP0473667B1 (fr)
JP (1) JPH04505531A (fr)
AT (1) ATE112657T1 (fr)
CA (1) CA2057881C (fr)
DE (1) DE69013151T2 (fr)
GB (1) GB8912012D0 (fr)
HK (1) HK137696A (fr)
WO (1) WO1990014734A1 (fr)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5519830A (en) * 1993-06-10 1996-05-21 Adc Telecommunications, Inc. Point-to-multipoint performance monitoring and failure isolation system
US5408462A (en) * 1993-10-07 1995-04-18 Adc Telecommunications, Inc. Protection switching apparatus and method
US5453737A (en) * 1993-10-08 1995-09-26 Adc Telecommunications, Inc. Control and communications apparatus
US6018528A (en) * 1994-04-28 2000-01-25 At&T Corp System and method for optimizing spectral efficiency using time-frequency-code slicing
US6334219B1 (en) 1994-09-26 2001-12-25 Adc Telecommunications Inc. Channel selection for a hybrid fiber coax network
US5680234A (en) * 1994-10-20 1997-10-21 Lucent Technologies Inc. Passive optical network with bi-directional optical spectral slicing and loop-back
US5521734A (en) * 1994-12-30 1996-05-28 At&T Corp. One-dimensional optical data arrays implemented within optical networks
US7280564B1 (en) 1995-02-06 2007-10-09 Adc Telecommunications, Inc. Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing
USRE42236E1 (en) 1995-02-06 2011-03-22 Adc Telecommunications, Inc. Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing
US5710648A (en) * 1995-12-29 1998-01-20 Lucent Technologies Inc. Optical communication system and remote sensor interrogation
US5861966A (en) * 1995-12-27 1999-01-19 Nynex Science & Technology, Inc. Broad band optical fiber telecommunications network
US5880864A (en) * 1996-05-30 1999-03-09 Bell Atlantic Network Services, Inc. Advanced optical fiber communications network
US5808767A (en) * 1996-05-30 1998-09-15 Bell Atlantic Network Services, Inc Fiber optic network with wavelength-division-multiplexed transmission to customer premises
US6137608A (en) * 1998-01-30 2000-10-24 Lucent Technologies Inc. Optical network switching system
US6882765B1 (en) 1999-11-02 2005-04-19 Xros, Inc. Connection protection between clients and optical cross-connect switches
US6597826B1 (en) 1999-11-02 2003-07-22 Xros, Inc. Optical cross-connect switching system with bridging, test access and redundancy
US6792174B1 (en) 1999-11-02 2004-09-14 Nortel Networks Limited Method and apparatus for signaling between an optical cross-connect switch and attached network equipment
US6571030B1 (en) 1999-11-02 2003-05-27 Xros, Inc. Optical cross-connect switching system
US6650803B1 (en) * 1999-11-02 2003-11-18 Xros, Inc. Method and apparatus for optical to electrical to optical conversion in an optical cross-connect switch
US7146103B2 (en) * 1999-12-29 2006-12-05 Forster Energy Llc Optical communications using multiplexed single sideband transmission and heterodyne detection
US7209660B1 (en) * 1999-12-29 2007-04-24 Forster Energy Llc Optical communications using heterodyne detection
US20060291868A1 (en) * 1999-12-29 2006-12-28 Forster Energy Llc Optical communications using multiplexed single sideband transmission and heterodyne detection
GB2361057B (en) * 2000-04-06 2002-06-26 Marconi Comm Ltd Optical signal monitor
US6407846B1 (en) 2001-03-16 2002-06-18 All Optical Networks, Inc. Photonic wavelength shifting method
US6865345B2 (en) * 2001-08-28 2005-03-08 Agilent Technologies, Inc. Frequency translating devices and frequency translating measurement systems that utilize light-activated resistors
JP4531740B2 (ja) * 2006-12-15 2010-08-25 富士通株式会社 コヒーレント光受信機
JP5034770B2 (ja) * 2007-08-16 2012-09-26 富士通株式会社 コヒーレント光受信器および光通信システム
KR20090087805A (ko) * 2008-02-13 2009-08-18 주식회사 케이티 Ｗｄｍ-ｐｏｎ에서의 광 검출 장치 및 그 방법
WO2010075886A1 (fr) * 2008-12-30 2010-07-08 Nokia Siemens Networks Oy Procédé et agencement de transmission de signaux dans un réseau point à multipoint
US9100139B2 (en) * 2012-04-30 2015-08-04 Juniper Networks, Inc. Optical communication link employing coherent detection and out of band channel identification
US10014955B1 (en) * 2015-04-24 2018-07-03 Vencore Labs, Inc. Signal processing circuit with optical local oscillator signal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3507064A1 (de) * 1985-02-28 1986-08-28 Standard Elektrik Lorenz Ag, 7000 Stuttgart Optisches nachrichtenuebertragungssystem im teilnehmeranschlussbereich
US4783852A (en) * 1985-09-18 1988-11-08 Siemens Aktiengesellschaft Method and apparatus for acquiring information using a relative phase deviation of the optical signal of a local oscillator of a homodyne receiver
US4701904A (en) * 1985-10-18 1987-10-20 American Telephone And Telegraph Company, At&T Bell Laboratories Optical local area network employing microwave modulation techniques

Also Published As

Publication number Publication date
GB8912012D0 (en) 1989-07-12
WO1990014734A1 (fr) 1990-11-29
JPH04505531A (ja) 1992-09-24
DE69013151T2 (de) 1995-03-16
ATE112657T1 (de) 1994-10-15
US5272556A (en) 1993-12-21
EP0473667B1 (fr) 1994-10-05
CA2057881C (fr) 1998-04-28
HK137696A (en) 1996-08-02
EP0473667A1 (fr) 1992-03-11
DE69013151D1 (de) 1994-11-10

Similar Documents

Publication Publication Date Title
CA2057881A1 (fr) Reseaux optiques
CA1199074A (fr) Reseau de communications avec voies optiques
US5107360A (en) Optical transmission of RF subcarriers in adjacent signal bands
US5694234A (en) Wavelength division multiplexing passive optical network including broadcast overlay
CA1107821A (fr) Systeme de communication par television a canaux multiples a transposition de frequence et a codage numerique
US5541757A (en) Optical fiber cable service system provided with video on demand service
CA2078076C (fr) Systeme de communication optique
KR0168417B1 (ko) 비동기 광 통신 시스템
CA2114653A1 (fr) Methode et appareil de transmission de signaux a large bande entre un poste central et des abonnes
JPH05183527A (ja) 光トランシーバ装置
US5245459A (en) Optical communications systems
TW370745B (en) Splitterless optical broadcast switch
US5479286A (en) Optical fibre communications system
CA2069944A1 (fr) Methode et appareil de transmission, via des liaisons optiques, de signaux radiofrequence a large bande modules en amplitude
AU552824B2 (en) Community antenna system
JPH0799829B2 (ja) マルチ使用者通信システム
JPH02238739A (ja) 特に加入者区域用の広帯域光通信システム
GB2282037A (en) RF-based high-bandwidth signal transmission
WO2001027940A3 (fr) Systeme et procede de transmission d'une pluralite de signaux vocaux, de donnees et video sur un reseau optique passif
Wood et al. Demonstration of a cost-effective, broadband passive optical network system
FI60474B (fi) Moduleringsanordning foer bildande av ett telefoni-frekvensmultiplexsystem
JPH0353628A (ja) 光通信方式
Shiozawa et al. Upstream-FDMA/downstream-TDM optical fiber multiaccess network
JPH06104867A (ja) 光送信装置
EP0461937A2 (fr) Système de distribution de signaux de télévision par câble utilisant des fibres optiques

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKEC Expiry (correction)

Effective date: 20121202