GB2222735B - Optical communications systems - Google Patents

Optical communications systems

Info

Publication number
GB2222735B
GB2222735B GB8916939A GB8916939A GB2222735B GB 2222735 B GB2222735 B GB 2222735B GB 8916939 A GB8916939 A GB 8916939A GB 8916939 A GB8916939 A GB 8916939A GB 2222735 B GB2222735 B GB 2222735B
Authority
GB
United Kingdom
Prior art keywords
communications systems
optical communications
optical
systems
communications
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
GB8916939A
Other versions
GB8916939D0 (en
GB2222735A (en
Inventor
Andrew Robert Hunwicks
Lawrence Bickers
Ian Douglas Henning
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
British Telecommunications 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
Priority claimed from GB888817705A external-priority patent/GB8817705D0/en
Priority claimed from GB898900731A external-priority patent/GB8900731D0/en
Application filed by British Telecommunications PLC filed Critical British Telecommunications PLC
Publication of GB8916939D0 publication Critical patent/GB8916939D0/en
Publication of GB2222735A publication Critical patent/GB2222735A/en
Application granted granted Critical
Publication of GB2222735B publication Critical patent/GB2222735B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B19/00—Teaching not covered by other main groups of this subclass
    • G09B19/06—Foreign languages
    • 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
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2589—Bidirectional transmission
GB8916939A 1988-07-25 1989-07-25 Optical communications systems Expired - Fee Related GB2222735B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888817705A GB8817705D0 (en) 1988-07-25 1988-07-25 Optical communications system
GB898900731A GB8900731D0 (en) 1989-01-13 1989-01-13 Optical communications system

Publications (3)

Publication Number Publication Date
GB8916939D0 GB8916939D0 (en) 1989-09-13
GB2222735A GB2222735A (en) 1990-03-14
GB2222735B true GB2222735B (en) 1992-08-19

Family

ID=26294199

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8916939A Expired - Fee Related GB2222735B (en) 1988-07-25 1989-07-25 Optical communications systems

Country Status (1)

Country Link
GB (1) GB2222735B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8903568D0 (en) * 1989-02-16 1989-04-05 British Telecomm Optical communications system
EP0607029B1 (en) * 1993-01-14 2000-12-20 Nippon Telegraph And Telephone Corporation Wavelength division multiplex bidirectional optical communication system
US5963349A (en) * 1997-01-27 1999-10-05 Lucent Technologies Inc. Inexpensive single-fiber bidirectional data link

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120457A2 (en) * 1983-03-25 1984-10-03 KE KOMMUNIKATIONS-ELEKTRONIK GMBH & CO Optical transmitter and receiver
GB2144598A (en) * 1981-07-14 1985-03-06 British Telecomm Laser telecommunications system
EP0240157A2 (en) * 1986-03-03 1987-10-07 Seiko Instruments Inc. A single transmission line bidirectional optical communication system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144598A (en) * 1981-07-14 1985-03-06 British Telecomm Laser telecommunications system
EP0120457A2 (en) * 1983-03-25 1984-10-03 KE KOMMUNIKATIONS-ELEKTRONIK GMBH & CO Optical transmitter and receiver
EP0240157A2 (en) * 1986-03-03 1987-10-07 Seiko Instruments Inc. A single transmission line bidirectional optical communication system

Also Published As

Publication number Publication date
GB8916939D0 (en) 1989-09-13
GB2222735A (en) 1990-03-14

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Legal Events

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

Effective date: 19950725