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GB2002950A - Optical radiation transmitter - Google Patents

Optical radiation transmitter

Info

Publication number
GB2002950A
GB2002950A GB7832524A GB7832524A GB2002950A GB 2002950 A GB2002950 A GB 2002950A GB 7832524 A GB7832524 A GB 7832524A GB 7832524 A GB7832524 A GB 7832524A GB 2002950 A GB2002950 A GB 2002950A
Authority
GB
United Kingdom
Prior art keywords
laser diode
signal
optical radiation
radiation transmitter
overload
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
GB7832524A
Other versions
GB2002950B (en
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB2002950A publication Critical patent/GB2002950A/en
Application granted granted Critical
Publication of GB2002950B publication Critical patent/GB2002950B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/06825—Protecting the laser, e.g. during switch-on/off, detection of malfunctioning or degradation

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
  • Semiconductor Lasers (AREA)

Abstract

The laser diode 2 of an optical radiation transmitter having an automatic control feedback system for normalising the optical output signal is protected from overload by arranging that the automatic controller 3 and detector 4 for controlling modulation of the laser diode provides an equivalent signal U2 when the modulation signal M fails to appear. This equivalent signal holds the laser diode at a low level operating value which, when the modulation signal reappears, will not overload the laser diode. <IMAGE>
GB7832524A 1977-08-17 1978-08-08 Optical radiation transmitter Expired GB2002950B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772736966 DE2736966A1 (en) 1977-08-17 1977-08-17 TRANSMITTER FOR OPTICAL RADIATION

Publications (2)

Publication Number Publication Date
GB2002950A true GB2002950A (en) 1979-02-28
GB2002950B GB2002950B (en) 1982-01-13

Family

ID=6016544

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7832524A Expired GB2002950B (en) 1977-08-17 1978-08-08 Optical radiation transmitter

Country Status (2)

Country Link
DE (1) DE2736966A1 (en)
GB (1) GB2002950B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911858A1 (en) * 1979-03-26 1980-10-02 Bosch Gmbh Robert LIMIT SWITCHING
EP0311279A1 (en) * 1987-09-25 1989-04-12 Kabushiki Kaisha Toshiba Semiconductor laser driving device for stabilizing the optical output thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3317027C2 (en) * 1983-05-10 1985-03-21 Hewlett-Packard Gmbh, 7030 Boeblingen Circuit arrangement for converting an electrical input signal into an optical output signal
DE3806824A1 (en) * 1988-03-03 1989-09-14 Ant Nachrichtentech Electro-optical transmission system
LU87901A1 (en) * 1990-08-27 1992-01-15 Siemens Ag PASSIVE OPTICAL TELECOMMUNICATION SYSTEM
DE19511819A1 (en) * 1995-03-30 1996-10-02 Sel Alcatel Ag Device for demultiplexing an optical digital signal

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215843A (en) * 1961-06-02 1965-11-02 Special Instr Lab Inc Photosensitive light source intensity control system
DE2218431C3 (en) * 1972-04-17 1986-10-23 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement to compensate for the non-linear relationship between applied voltage and light emission in luminescent diodes
DE2503568A1 (en) * 1975-01-29 1976-08-05 Koerting Radio Werke Gmbh Battery operated radio sound or TV receiver - has an automatic switch for supply current disconnection which may be fitted into headphone
DE2648901A1 (en) * 1976-10-28 1978-05-03 Blaupunkt Werke Gmbh CIRCUIT ARRANGEMENT FOR THE SUPPRESSION OF INTERFERENCE PULSES IN AN AM RECEIVER

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911858A1 (en) * 1979-03-26 1980-10-02 Bosch Gmbh Robert LIMIT SWITCHING
EP0311279A1 (en) * 1987-09-25 1989-04-12 Kabushiki Kaisha Toshiba Semiconductor laser driving device for stabilizing the optical output thereof
US4884280A (en) * 1987-09-25 1989-11-28 Kabushiki Kaisha Toshiba Semiconductor laser driving device for stabilizing the optical output thereof

Also Published As

Publication number Publication date
DE2736966A1 (en) 1979-03-01
GB2002950B (en) 1982-01-13

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Legal Events

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