GB1539624A - Laser control system - Google Patents

Laser control system

Info

Publication number
GB1539624A
GB1539624A GB547976A GB547976A GB1539624A GB 1539624 A GB1539624 A GB 1539624A GB 547976 A GB547976 A GB 547976A GB 547976 A GB547976 A GB 547976A GB 1539624 A GB1539624 A GB 1539624A
Authority
GB
United Kingdom
Prior art keywords
laser
modulation
depth
control system
laser control
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
GB547976A
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
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB547976A priority Critical patent/GB1539624A/en
Priority to CH166477A priority patent/CH616519A5/en
Publication of GB1539624A publication Critical patent/GB1539624A/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
    • H04B10/50—Transmitters
    • H04B10/564—Power control
    • 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
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/06832—Stabilising during amplitude modulation
    • 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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/504—Laser transmitters using direct modulation

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Semiconductor Lasers (AREA)

Abstract

A description is given of an arrangement for monitoring both the depth of modulation and the optical power of a light source, e.g. a GaAs laser. Feedback signals (PO, PM) are generated which correct the level of the threshold value bias (PO) and the depth (PM) of modulation of the laser, in order to eliminate the unfavourable effects of ageing and temperature. The arrangement monitors the optical output power when a portion is branched off from the light signal emerging from the surface of the laser at the front or at the rear and is detected by means of a photodiode (1). <IMAGE>
GB547976A 1976-02-11 1976-02-11 Laser control system Expired GB1539624A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB547976A GB1539624A (en) 1976-02-11 1976-02-11 Laser control system
CH166477A CH616519A5 (en) 1976-02-11 1977-02-11 Arrangement for controlling a light source.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB547976A GB1539624A (en) 1976-02-11 1976-02-11 Laser control system

Publications (1)

Publication Number Publication Date
GB1539624A true GB1539624A (en) 1979-01-31

Family

ID=9796981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB547976A Expired GB1539624A (en) 1976-02-11 1976-02-11 Laser control system

Country Status (2)

Country Link
CH (1) CH616519A5 (en)
GB (1) GB1539624A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433789A1 (en) * 1978-08-16 1980-03-14 Cselt Centro Studi Lab Telecom METHOD AND SYSTEM FOR CONTROLLING THE PERFORMANCE OF AN ELECTRONIC DEVICE, SUCH AS A SEMICONDUCTOR LASER
FR2468232A1 (en) * 1979-10-18 1981-04-30 Philips Nv REGULATION CIRCUIT FOR THE LASER EXCITATION CURRENT
FR2494514A1 (en) * 1980-11-14 1982-05-21 Lignes Telegraph Telephon DEVICE FOR STABILIZING THE OUTPUT POWER OF A TRANSMITTER MODULE FOR AN OPTICAL FIBER TRANSMISSION SYSTEM
EP0169579A2 (en) * 1984-07-27 1986-01-29 Matsushita Electric Industrial Co., Ltd. Semiconductor laser drive circuit
EP0516315A2 (en) * 1991-05-29 1992-12-02 Nortel Networks Corporation Binary modulation of injection lasers
EP0528569A1 (en) * 1991-08-15 1993-02-24 Nortel Networks Corporation Injection laser modulation
EP0564367A1 (en) * 1992-04-03 1993-10-06 Thomson Hybrides Control circuit for an amplitude-modulated semiconductor laser
US10205532B2 (en) * 2016-07-08 2019-02-12 Hilight Semiconductor Limited Laser power controller
US20190089464A1 (en) * 2016-07-08 2019-03-21 Hilight Semiconductor Limited Laser power controller

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433789A1 (en) * 1978-08-16 1980-03-14 Cselt Centro Studi Lab Telecom METHOD AND SYSTEM FOR CONTROLLING THE PERFORMANCE OF AN ELECTRONIC DEVICE, SUCH AS A SEMICONDUCTOR LASER
FR2468232A1 (en) * 1979-10-18 1981-04-30 Philips Nv REGULATION CIRCUIT FOR THE LASER EXCITATION CURRENT
FR2494514A1 (en) * 1980-11-14 1982-05-21 Lignes Telegraph Telephon DEVICE FOR STABILIZING THE OUTPUT POWER OF A TRANSMITTER MODULE FOR AN OPTICAL FIBER TRANSMISSION SYSTEM
EP0052536A1 (en) * 1980-11-14 1982-05-26 Lignes Telegraphiques Et Telephoniques L.T.T. Sender module output power stabilization device for an optical fibre transmission system
EP0169579A2 (en) * 1984-07-27 1986-01-29 Matsushita Electric Industrial Co., Ltd. Semiconductor laser drive circuit
EP0169579A3 (en) * 1984-07-27 1988-02-10 Matsushita Electric Industrial Co., Ltd. Semiconductor laser drive circuit
EP0516315A2 (en) * 1991-05-29 1992-12-02 Nortel Networks Corporation Binary modulation of injection lasers
EP0516315A3 (en) * 1991-05-29 1993-01-20 Northern Telecom Limited Binary modulation of injection lasers
EP0528569A1 (en) * 1991-08-15 1993-02-24 Nortel Networks Corporation Injection laser modulation
EP0564367A1 (en) * 1992-04-03 1993-10-06 Thomson Hybrides Control circuit for an amplitude-modulated semiconductor laser
FR2689697A1 (en) * 1992-04-03 1993-10-08 Thomson Hybrides Control circuit for the modulated power emitted by the semiconductor laser.
US10205532B2 (en) * 2016-07-08 2019-02-12 Hilight Semiconductor Limited Laser power controller
US20190089464A1 (en) * 2016-07-08 2019-03-21 Hilight Semiconductor Limited Laser power controller
US10749605B2 (en) 2016-07-08 2020-08-18 Hilight Semiconductor Limited Laser power controller

Also Published As

Publication number Publication date
CH616519A5 (en) 1980-03-31

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19970131