CA2061041A1 - Optical communications systems for the subscriber area with optical amplifiers - Google Patents

Optical communications systems for the subscriber area with optical amplifiers

Info

Publication number
CA2061041A1
CA2061041A1 CA2061041A CA2061041A CA2061041A1 CA 2061041 A1 CA2061041 A1 CA 2061041A1 CA 2061041 A CA2061041 A CA 2061041A CA 2061041 A CA2061041 A CA 2061041A CA 2061041 A1 CA2061041 A1 CA 2061041A1
Authority
CA
Canada
Prior art keywords
subscribers
signals
central station
transmitted
optical
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
CA2061041A
Other languages
French (fr)
Other versions
CA2061041C (en
Inventor
Horst Ohnsorge
Adolf Weygang
Rolf Heidemann
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.)
Alcatel Lucent NV
Original Assignee
Horst Ohnsorge
Adolf Weygang
Rolf Heidemann
Alcatel N.V.
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
Priority claimed from DE19914104084 external-priority patent/DE4104084A1/en
Priority claimed from DE19914116660 external-priority patent/DE4116660A1/en
Application filed by Horst Ohnsorge, Adolf Weygang, Rolf Heidemann, Alcatel N.V. filed Critical Horst Ohnsorge
Publication of CA2061041A1 publication Critical patent/CA2061041A1/en
Application granted granted Critical
Publication of CA2061041C publication Critical patent/CA2061041C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04B10/27—Arrangements for networking
    • 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
    • H04B10/27—Arrangements for networking
    • H04B10/272—Star-type networks or tree-type networks
    • 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
    • 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
    • H04B10/297—Bidirectional amplification
    • H04B10/2972—Each direction being amplified separately
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0228—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
    • H04J14/023—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
    • H04J14/0232—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON] for downstream transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0247—Sharing one wavelength for at least a group of ONUs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/0252—Sharing one wavelength for at least a group of ONUs, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0226—Fixed carrier allocation, e.g. according to service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0298—Wavelength-division multiplex systems with sub-carrier multiplexing [SCM]

Abstract

The system according to the invention serves to distribute communication signals, in particular television signals, from a central station to a multiplicity of subscribers and to enable two-way transmission of telephone and data signals between the central station and the subscribers. According to the invention, the network used for this purpose is an optical waveguide network with a star-star structure in which fibre-optic amplifiers (10, 11) are provided between successive branching points. The communication signals to be distributed are transmitted via the optical waveguide network on a first wavelength ( lambda 1) to the subscribers, the subscriber-individual communication signals to be transmitted from the central station (1) to the subscribers (Ti) are converted by frequency modulation to a frequency band (FB2) which differs from that of the distribution signals (by frequency modulation) and are transmitted on the same wavelength as that of the distribution signals to the subscribers, and the subscriber-individual signals to be transmitted from the subscribers (Ti) to the central station (1) are converted by frequency modulation to a further frequency band (FB3) and transmitted optically on a second wavelength ( lambda 2) to the central station. This optical signal is amplified at suitable points (A), and a plurality of alternative embodiments for this amplification are indicated. <IMAGE>
CA002061041A 1991-02-11 1992-02-11 Optical communications systems for the subscriber area with optical amplifiers Expired - Fee Related CA2061041C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEP4104084.8 1991-02-11
DE19914104084 DE4104084A1 (en) 1991-02-11 1991-02-11 Optical data transmission system for subscriber connecting areas with optical amplifiers - involves central control with two-way TV and data signal exchange with star-star structure
DE19914116660 DE4116660A1 (en) 1991-05-22 1991-05-22 Optical data TV transmission system for subscriber connecting area with optical amplifiers
DEP4116660.4 1991-05-22

Publications (2)

Publication Number Publication Date
CA2061041A1 true CA2061041A1 (en) 1992-08-12
CA2061041C CA2061041C (en) 1999-04-06

Family

ID=25900922

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002061041A Expired - Fee Related CA2061041C (en) 1991-02-11 1992-02-11 Optical communications systems for the subscriber area with optical amplifiers

Country Status (9)

Country Link
US (1) US5337175A (en)
EP (1) EP0499065B1 (en)
JP (1) JP3169665B2 (en)
AT (1) ATE153812T1 (en)
AU (1) AU649102B2 (en)
CA (1) CA2061041C (en)
DE (1) DE59208529D1 (en)
ES (1) ES2104740T3 (en)
NZ (1) NZ241581A (en)

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AU6386896A (en) * 1995-06-22 1997-01-22 Scientific-Atlanta, Inc. Hybrid fiber coax communications system
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US5861966A (en) * 1995-12-27 1999-01-19 Nynex Science & Technology, Inc. Broad band optical fiber telecommunications network
US5867305A (en) * 1996-01-19 1999-02-02 Sdl, Inc. Optical amplifier with high energy levels systems providing high peak powers
US5801858A (en) * 1996-06-25 1998-09-01 Northern Telecom Limited Optical transmission systems using optical amplifiers and wavelength division multiplexing
DE19701888A1 (en) * 1997-01-21 1998-07-23 Alsthom Cge Alcatel System for the optical transmission of information
US5912749A (en) * 1997-02-11 1999-06-15 Lucent Technologies Inc. Call admission control in cellular networks
DE19737482A1 (en) 1997-08-28 1999-03-04 Alsthom Cge Alcatel Process for optical transmission over an optical fiber network, and optical transmission network
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FR2769139B1 (en) * 1997-09-29 1999-12-24 Corning Inc OPTICAL AMPLIFIER APPARATUS
CN1964235B (en) * 1998-02-06 2010-10-20 富士通株式会社 Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control method
DE19818783A1 (en) * 1998-04-27 1999-10-28 Delphi Automotive Systems Gmbh Optical network
EP1033835A3 (en) * 1999-03-03 2004-02-11 Agilent Technologies, Inc. (a Delaware corporation) Optical central office
US6460182B1 (en) 1999-05-11 2002-10-01 Marconi Communications, Inc. Optical communication system for transmitting RF signals downstream and bidirectional telephony signals which also include RF control signals upstream
AU8033700A (en) * 1999-09-14 2001-04-17 Marconi Communications, Inc. Apparatus and methods for extracting two distinct frequency bands from light received by a photodiode
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US7352967B1 (en) 2000-06-21 2008-04-01 Mitsubishi Denki Kabushiki Kaisha Data transmission system
JP4776835B2 (en) * 2001-09-20 2011-09-21 シンクレイヤ株式会社 Transmission system of optical fiber network system
GB0206049D0 (en) * 2002-03-14 2002-04-24 Marconi Comm Ltd Add/drop node for an optical communications network
US7075712B2 (en) 2002-05-30 2006-07-11 Fujitsu Limited Combining and distributing amplifiers for optical network and method
EP1512236B1 (en) * 2002-05-30 2006-08-09 Fujitsu Limited Amplifiers for optical networks and method
US7085496B2 (en) * 2002-05-30 2006-08-01 Fujitsu Limited Passive add/drop amplifier for optical networks and method
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JP2004120694A (en) * 2002-09-30 2004-04-15 Synclayer Inc Optical transmitting apparatus, repeating apparatus, and optical transmitting system using the same
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JP4411405B2 (en) * 2003-11-12 2010-02-10 株式会社創業 Real-time broadcasting system and real-time broadcasting signal transmission method
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Also Published As

Publication number Publication date
AU649102B2 (en) 1994-05-12
NZ241581A (en) 1995-02-24
ES2104740T3 (en) 1997-10-16
CA2061041C (en) 1999-04-06
EP0499065A3 (en) 1993-09-22
DE59208529D1 (en) 1997-07-03
ATE153812T1 (en) 1997-06-15
EP0499065B1 (en) 1997-05-28
JP3169665B2 (en) 2001-05-28
EP0499065A2 (en) 1992-08-19
JPH0563659A (en) 1993-03-12
AU1087492A (en) 1992-08-13
US5337175A (en) 1994-08-09

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