JPS5643788A - Bias circuit for laser diode - Google Patents

Bias circuit for laser diode

Info

Publication number
JPS5643788A
JPS5643788A JP11953279A JP11953279A JPS5643788A JP S5643788 A JPS5643788 A JP S5643788A JP 11953279 A JP11953279 A JP 11953279A JP 11953279 A JP11953279 A JP 11953279A JP S5643788 A JPS5643788 A JP S5643788A
Authority
JP
Japan
Prior art keywords
laser diode
light emitting
emitting output
photodiode
transistor
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
JP11953279A
Other languages
Japanese (ja)
Other versions
JPS5928075B2 (en
Inventor
Tadayoshi Kitayama
Takahisa Oota
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP11953279A priority Critical patent/JPS5928075B2/en
Publication of JPS5643788A publication Critical patent/JPS5643788A/en
Publication of JPS5928075B2 publication Critical patent/JPS5928075B2/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
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters

Abstract

PURPOSE:To enable electrically monitoring of a light emitting output waveform without impairing stable action of mean light emitting output of a laser diode by providing a resistance element connected to a photodiode in series in such a manner that a DC bias path of an amplifier is formed. CONSTITUTION:Supplied with a bias current from a transistor 3, a laser diode emits light at a certain action level according to a modulation signal from an input terminal 8. The light emitting output of the laser diode 1 is transmitted to a photodiode 2 by way of a light wave guide 9, which provides a photodetecting current according to the light emitting output of the laser diode 1 to the base of a transistor 10. In this case, the base of the transistor 10 is grounded in an AC manner with a condenser 6 so that only DC component is inputted thereto as control signal. Connected in series to a photodiode 1, a resistance element 12 is provided to detect the photodetecting current whereby the light emitting output waveform is obtained from a monitor terminal 14 without impairing the stability of the light emitting output of the laser diode 1.
JP11953279A 1979-09-17 1979-09-17 Laser diode bias circuit Expired JPS5928075B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11953279A JPS5928075B2 (en) 1979-09-17 1979-09-17 Laser diode bias circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11953279A JPS5928075B2 (en) 1979-09-17 1979-09-17 Laser diode bias circuit

Publications (2)

Publication Number Publication Date
JPS5643788A true JPS5643788A (en) 1981-04-22
JPS5928075B2 JPS5928075B2 (en) 1984-07-10

Family

ID=14763607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11953279A Expired JPS5928075B2 (en) 1979-09-17 1979-09-17 Laser diode bias circuit

Country Status (1)

Country Link
JP (1) JPS5928075B2 (en)

Also Published As

Publication number Publication date
JPS5928075B2 (en) 1984-07-10

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