GB2110498B - Laser telecommunications system - Google Patents

Laser telecommunications system

Info

Publication number
GB2110498B
GB2110498B GB8220204A GB8220204A GB2110498B GB 2110498 B GB2110498 B GB 2110498B GB 8220204 A GB8220204 A GB 8220204A GB 8220204 A GB8220204 A GB 8220204A GB 2110498 B GB2110498 B GB 2110498B
Authority
GB
United Kingdom
Prior art keywords
telecommunications system
laser
laser telecommunications
telecommunications
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
Application number
GB8220204A
Other versions
GB2110498A (en
Inventor
David William Smith
Derek John Malyon
Ronald William Berry
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
Application filed by British Telecommunications PLC filed Critical British Telecommunications PLC
Priority to GB8220204A priority Critical patent/GB2110498B/en
Publication of GB2110498A publication Critical patent/GB2110498A/en
Application granted granted Critical
Publication of GB2110498B publication Critical patent/GB2110498B/en
Expired 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
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • 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
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4006—Injection locking
    • 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
    • H04B10/2914—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 using lumped semiconductor optical amplifiers [SOA]
    • 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
    • H04B10/299—Signal waveform processing, e.g. reshaping or retiming
    • 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
    • H04B10/40—Transceivers
    • H04B10/43—Transceivers using a single component as both light source and receiver, e.g. using a photoemitter as a photoreceiver
    • 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
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/67—Optical arrangements in the receiver
    • H04B10/671—Optical arrangements in the receiver for controlling the input optical signal
    • H04B10/675—Optical arrangements in the receiver for controlling the input optical signal for controlling the optical bandwidth of the input signal, e.g. spectral filtering

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
GB8220204A 1981-07-14 1982-07-12 Laser telecommunications system Expired GB2110498B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8220204A GB2110498B (en) 1981-07-14 1982-07-12 Laser telecommunications system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8121709 1981-07-14
GB8220204A GB2110498B (en) 1981-07-14 1982-07-12 Laser telecommunications system

Publications (2)

Publication Number Publication Date
GB2110498A GB2110498A (en) 1983-06-15
GB2110498B true GB2110498B (en) 1985-09-04

Family

ID=26280122

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8220204A Expired GB2110498B (en) 1981-07-14 1982-07-12 Laser telecommunications system

Country Status (1)

Country Link
GB (1) GB2110498B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691385A (en) * 1985-09-05 1987-09-01 Caterpillar Industrial Inc. Optical communication apparatus for a vehicle
FR2652465B1 (en) * 1989-09-27 1991-11-15 France Etat PHOTORECEPTOR FOR FREQUENCY MODULATED OPTICAL SIGNALS.
ATE121248T1 (en) * 1990-09-14 1995-04-15 Siemens Ag BIDIRECTIONAL TELECOMMUNICATIONS SYSTEM.

Also Published As

Publication number Publication date
GB2110498A (en) 1983-06-15

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950712