JPS55157280A - Semiconductor laser driving apparatus - Google Patents

Semiconductor laser driving apparatus

Info

Publication number
JPS55157280A
JPS55157280A JP6491979A JP6491979A JPS55157280A JP S55157280 A JPS55157280 A JP S55157280A JP 6491979 A JP6491979 A JP 6491979A JP 6491979 A JP6491979 A JP 6491979A JP S55157280 A JPS55157280 A JP S55157280A
Authority
JP
Japan
Prior art keywords
circuit
laser
current
pulse modulation
output
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.)
Pending
Application number
JP6491979A
Other languages
Japanese (ja)
Inventor
Hideshi Kenjo
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.)
Olympus Corp
Original Assignee
Olympus Optical Co 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
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP6491979A priority Critical patent/JPS55157280A/en
Publication of JPS55157280A publication Critical patent/JPS55157280A/en
Pending 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
    • H01S5/06835—Stabilising during pulse modulation or generation

Landscapes

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

Abstract

PURPOSE:To improve response for pulse modulation by a method wherein a bias current which energizes a semiconductor laser to a light emitting thershold level is fed to it and a driving current is overlaid on it in accordance with a pulse modulation signal. CONSTITUTION:A semiconductor laser 1 is connected with a current source circuit 3 through a threshold current driving circuit 2, and a bias current is supplied. And the circuit 3 is connected with the laser 1 through a current control circuit 4, a pulse modulation driving circuit 5 and a diode 6, and a driving current is supplied to the laser 1 according to a pulse modulation signal which is put into the circuit 5. On the other hand in a light path of the laser 1 a photodetector 7 is provided, and by its output being put into a detector circuit 8 a peak value of the output light of the laser is detected. And an output of a circuit 8 is added on a comparator circuit 9 and by comparing it with a signal from a comparing signal output circuit 10, the circuit 4 is controlled according to a result compared, and a quantity of the driving current fed to the laser 1 is adjusted.
JP6491979A 1979-05-28 1979-05-28 Semiconductor laser driving apparatus Pending JPS55157280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6491979A JPS55157280A (en) 1979-05-28 1979-05-28 Semiconductor laser driving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6491979A JPS55157280A (en) 1979-05-28 1979-05-28 Semiconductor laser driving apparatus

Publications (1)

Publication Number Publication Date
JPS55157280A true JPS55157280A (en) 1980-12-06

Family

ID=13271928

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6491979A Pending JPS55157280A (en) 1979-05-28 1979-05-28 Semiconductor laser driving apparatus

Country Status (1)

Country Link
JP (1) JPS55157280A (en)

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