GB2286080A - Laser diode drive circuit - Google Patents

Laser diode drive circuit

Info

Publication number
GB2286080A
GB2286080A GB9506997A GB9506997A GB2286080A GB 2286080 A GB2286080 A GB 2286080A GB 9506997 A GB9506997 A GB 9506997A GB 9506997 A GB9506997 A GB 9506997A GB 2286080 A GB2286080 A GB 2286080A
Authority
GB
United Kingdom
Prior art keywords
laser diode
drive circuit
diode drive
diode
inductor
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
GB9506997A
Other versions
GB9506997D0 (en
GB2286080B (en
Inventor
Anthony Raven
Robin Michael Lee
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.)
Diomed Ltd
Original Assignee
Diomed Ltd
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 GB929221004A external-priority patent/GB9221104D0/en
Application filed by Diomed Ltd filed Critical Diomed Ltd
Priority to GB9506997A priority Critical patent/GB2286080B/en
Publication of GB9506997D0 publication Critical patent/GB9506997D0/en
Publication of GB2286080A publication Critical patent/GB2286080A/en
Application granted granted Critical
Publication of GB2286080B publication Critical patent/GB2286080B/en
Anticipated expiration legal-status Critical
Revoked 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
    • H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
    • H01S5/042—Electrical excitation ; Circuits therefor
    • 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

Landscapes

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

Abstract

The lasing output of a laser diode (1) is controlled by the current through the diode (1). The laser diode (1) is driven by a switched mode drive circuit in which a pulsed signal is applied to a smoothing circuit, typically including a capacitor C and an inductor L, arranged to provide a smoothed output voltage whose magnitude depends on the pulse width of the drive signal. <IMAGE>
GB9506997A 1992-10-07 1993-09-10 Laser diode drive circuit Revoked GB2286080B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9506997A GB2286080B (en) 1992-10-07 1993-09-10 Laser diode drive circuit

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB929221004A GB9221104D0 (en) 1992-10-07 1992-10-07 Laser diode drive circuit
PCT/GB1993/001915 WO1994008370A1 (en) 1992-10-07 1993-09-10 Laser diode drive circuit
GB9506997A GB2286080B (en) 1992-10-07 1993-09-10 Laser diode drive circuit

Publications (3)

Publication Number Publication Date
GB9506997D0 GB9506997D0 (en) 1995-05-31
GB2286080A true GB2286080A (en) 1995-08-02
GB2286080B GB2286080B (en) 1996-10-16

Family

ID=26301749

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9506997A Revoked GB2286080B (en) 1992-10-07 1993-09-10 Laser diode drive circuit

Country Status (1)

Country Link
GB (1) GB2286080B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2422115A1 (en) * 1974-05-08 1975-11-27 Braun Ag Light emitting diode operating cct. - has current supply transformer whose secondary cct. incorporates the light emitting diode
JPS61256682A (en) * 1985-05-08 1986-11-14 Pioneer Electronic Corp Laser diode drive circuit
JPS62257778A (en) * 1986-04-30 1987-11-10 Fujitsu Ltd Drive circuit for laser diode

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2422115A1 (en) * 1974-05-08 1975-11-27 Braun Ag Light emitting diode operating cct. - has current supply transformer whose secondary cct. incorporates the light emitting diode
JPS61256682A (en) * 1985-05-08 1986-11-14 Pioneer Electronic Corp Laser diode drive circuit
JPS62257778A (en) * 1986-04-30 1987-11-10 Fujitsu Ltd Drive circuit for laser diode

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan vol 11 no 108,(E-495)(2555)4 Apr 87 & JP 61256682 A (PIONEER ELECTRONIC) *
Patent Abstracts of Japan vol 12 no 135, (E-604), 23 Apr 88 & JP 62257778 A (FUJITSU) *

Also Published As

Publication number Publication date
GB9506997D0 (en) 1995-05-31
GB2286080B (en) 1996-10-16

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Legal Events

Date Code Title Description
773K Patent revoked under sect. 73(2)/1977