JPS6481288A - Laser diode control device - Google Patents

Laser diode control device

Info

Publication number
JPS6481288A
JPS6481288A JP23961487A JP23961487A JPS6481288A JP S6481288 A JPS6481288 A JP S6481288A JP 23961487 A JP23961487 A JP 23961487A JP 23961487 A JP23961487 A JP 23961487A JP S6481288 A JPS6481288 A JP S6481288A
Authority
JP
Japan
Prior art keywords
signal
pulse signal
optical output
monitoring use
existence
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
JP23961487A
Other languages
Japanese (ja)
Inventor
Keiichi Hoshi
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP23961487A priority Critical patent/JPS6481288A/en
Publication of JPS6481288A publication Critical patent/JPS6481288A/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

Abstract

PURPOSE:To stabilize an optical output at the existence of a pulse signal for monitoring use and to make the optical output variable at the time other than the existence of the pulse signal for monitoring use by a method wherein an identical modulation current flows at the existence of the pulse signal for monitoring use and the modulation current is changed at the time other than the existence of the pulse signal for monitoring use. CONSTITUTION:A detection circuit 11 outputs a detection signal 12 when one part of a beam radiated from a laser diode 1 is made incident and a pulse signal 10 for monitoring use is in an 'ON' state; it holds the signal 12 when the pulse signal is in an 'OFF' state. A comparison circuit 13 compares the signal 12 with a reference voltage 14, and outputs a control signal 2. When the signal 10 is in the 'ON' state, an input pulse signal 7 is made to be identical to the signal and selects an identical modulation current 6. A control current circuit 3 is operated in such a way that an optical output at this time is used as a reference beam and that a control current 4 used to stabilize the optical output flows. When the signal 10 is in the 'OFF' state, the signal 12 is held and, accordingly, the control current 4 is also held. By this setup, when the input pulse signal is changed, the modulation current 6 is changed, a driving current of the laser diode 1 is changed and the optical output becomes variable.
JP23961487A 1987-09-22 1987-09-22 Laser diode control device Pending JPS6481288A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23961487A JPS6481288A (en) 1987-09-22 1987-09-22 Laser diode control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23961487A JPS6481288A (en) 1987-09-22 1987-09-22 Laser diode control device

Publications (1)

Publication Number Publication Date
JPS6481288A true JPS6481288A (en) 1989-03-27

Family

ID=17047356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23961487A Pending JPS6481288A (en) 1987-09-22 1987-09-22 Laser diode control device

Country Status (1)

Country Link
JP (1) JPS6481288A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009039819A (en) * 2007-08-09 2009-02-26 Nidec Sankyo Corp Continuous processing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009039819A (en) * 2007-08-09 2009-02-26 Nidec Sankyo Corp Continuous processing apparatus

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