GB2191645B - Optical telecommunication systems - Google Patents

Optical telecommunication systems

Info

Publication number
GB2191645B
GB2191645B GB8614403A GB8614403A GB2191645B GB 2191645 B GB2191645 B GB 2191645B GB 8614403 A GB8614403 A GB 8614403A GB 8614403 A GB8614403 A GB 8614403A GB 2191645 B GB2191645 B GB 2191645B
Authority
GB
United Kingdom
Prior art keywords
light
wavelength
point
telecommunication systems
optical telecommunication
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
GB8614403A
Other versions
GB8614403D0 (en
GB2191645A (en
Inventor
Isobel Jennifer Goddard
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.)
STC PLC
Original Assignee
STC PLC
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 STC PLC filed Critical STC PLC
Priority to GB8614403A priority Critical patent/GB2191645B/en
Publication of GB8614403D0 publication Critical patent/GB8614403D0/en
Publication of GB2191645A publication Critical patent/GB2191645A/en
Application granted granted Critical
Publication of GB2191645B publication Critical patent/GB2191645B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H04J14/0227—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
    • H04J14/0246—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 using one wavelength per ONU
    • 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
    • H04J14/025—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 using one wavelength per ONU, 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
    • H04J14/0278—WDM optical network architectures
    • H04J14/028—WDM bus architectures
    • 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
    • H04J14/0283—WDM ring architectures

Abstract

In an optical transmission system, e.g. of the ring or bus type, the same optical transmission path is used to convey both wavelength-division- multiplexed (WDM) light and light for point-to-point links. In one example the WDM light is centred on a wavelength of 1.5 mu m, and the point-to-point links use light at 1.3 mu m. At the nodes wavelength-selective optical couplers (1,2,3,4) are used to couple or connect the receivers and the transmitters to the transmission paths. <IMAGE>
GB8614403A 1986-06-13 1986-06-13 Optical telecommunication systems Expired - Fee Related GB2191645B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8614403A GB2191645B (en) 1986-06-13 1986-06-13 Optical telecommunication systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8614403A GB2191645B (en) 1986-06-13 1986-06-13 Optical telecommunication systems

Publications (3)

Publication Number Publication Date
GB8614403D0 GB8614403D0 (en) 1986-07-16
GB2191645A GB2191645A (en) 1987-12-16
GB2191645B true GB2191645B (en) 1990-09-05

Family

ID=10599407

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8614403A Expired - Fee Related GB2191645B (en) 1986-06-13 1986-06-13 Optical telecommunication systems

Country Status (1)

Country Link
GB (1) GB2191645B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0712230B2 (en) * 1988-07-18 1995-02-08 富士通株式会社 Optical switching system
GB2232548A (en) * 1989-04-25 1990-12-12 British Telecomm An optical network and a method of using the network
US5532864A (en) * 1995-06-01 1996-07-02 Ciena Corporation Optical monitoring channel for wavelength division multiplexed optical communication system
JP3463717B2 (en) * 1995-08-24 2003-11-05 三菱電機株式会社 WDM optical transmission apparatus and WDM optical transmission system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1161860A (en) * 1967-01-13 1969-08-20 Ibm Optical Communication Systems.
GB2014752A (en) * 1978-01-31 1979-08-30 Nippon Telegraph & Telephone Element for use in optical multiplexer or de-multiplexer
EP0053236A1 (en) * 1980-11-27 1982-06-09 ANT Nachrichtentechnik GmbH Service-integrated digital transmission system
EP0053238A1 (en) * 1980-11-27 1982-06-09 ANT Nachrichtentechnik GmbH Service-integrated digital transmission system
GB2105544A (en) * 1981-09-01 1983-03-23 Standard Telephones Cables Ltd Multiplexing of optical signals
EP0138698A2 (en) * 1983-10-11 1985-04-24 Alcatel Cit Optical wavelength division multiplexer-demultiplexer for bidirectional communication
EP0153722A2 (en) * 1984-03-02 1985-09-04 Oki Electric Industry Company, Limited Hybrid optical wavelength division multiplexer-demultiplexer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1161860A (en) * 1967-01-13 1969-08-20 Ibm Optical Communication Systems.
GB2014752A (en) * 1978-01-31 1979-08-30 Nippon Telegraph & Telephone Element for use in optical multiplexer or de-multiplexer
EP0053236A1 (en) * 1980-11-27 1982-06-09 ANT Nachrichtentechnik GmbH Service-integrated digital transmission system
EP0053238A1 (en) * 1980-11-27 1982-06-09 ANT Nachrichtentechnik GmbH Service-integrated digital transmission system
GB2105544A (en) * 1981-09-01 1983-03-23 Standard Telephones Cables Ltd Multiplexing of optical signals
EP0138698A2 (en) * 1983-10-11 1985-04-24 Alcatel Cit Optical wavelength division multiplexer-demultiplexer for bidirectional communication
EP0153722A2 (en) * 1984-03-02 1985-09-04 Oki Electric Industry Company, Limited Hybrid optical wavelength division multiplexer-demultiplexer

Also Published As

Publication number Publication date
GB8614403D0 (en) 1986-07-16
GB2191645A (en) 1987-12-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee