JPS56105685A - Monitoring circuit for semiconductor luminous element - Google Patents

Monitoring circuit for semiconductor luminous element

Info

Publication number
JPS56105685A
JPS56105685A JP741480A JP741480A JPS56105685A JP S56105685 A JPS56105685 A JP S56105685A JP 741480 A JP741480 A JP 741480A JP 741480 A JP741480 A JP 741480A JP S56105685 A JPS56105685 A JP S56105685A
Authority
JP
Japan
Prior art keywords
amplifier
laser
comparator
value
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.)
Granted
Application number
JP741480A
Other languages
Japanese (ja)
Other versions
JPS6155794B2 (en
Inventor
Masaru Nakamura
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.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
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 Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP741480A priority Critical patent/JPS56105685A/en
Publication of JPS56105685A publication Critical patent/JPS56105685A/en
Publication of JPS6155794B2 publication Critical patent/JPS6155794B2/ja
Granted 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 ensure response to the deterioration, etc. of a luminous element used for an optical communication device by a method wherein a standard drive current setting circuit and a reference voltage value setting circuit are mounted to a semiconductor luminous monitoring circuit, both circuits are interlocked and a reference voltage value is automatically brought to a proper value with the variation of a standard drive current value. CONSTITUTION:The first amplifier 23, the second amplifier 26 with resistors 24, 25 deciding gains and a transistor 30 for driving a laser are connected between the semiconductor laser 20 and a light detector 21 for detecting the output of the laser 20. An emitter of the trasistor 30 is grounded through a resistor 31 while being branched and being connected to a comparator 32, and a series circuit consisting of a constant-voltage source 28 and the third amplifier 29 is installed between the second amplifier 26 and the comparator 32. In such constitution, the output of the laser 20 is detected by means of the detector 21, the signals are negatively fed back to the transistor 30 through the amplifier 26, the circuit is stabilized while set voltage VB is applied to the amplifier 29 through the constant-voltage source 28, and the output is used for a reference value VS of the comparator 32.
JP741480A 1980-01-26 1980-01-26 Monitoring circuit for semiconductor luminous element Granted JPS56105685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP741480A JPS56105685A (en) 1980-01-26 1980-01-26 Monitoring circuit for semiconductor luminous element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP741480A JPS56105685A (en) 1980-01-26 1980-01-26 Monitoring circuit for semiconductor luminous element

Publications (2)

Publication Number Publication Date
JPS56105685A true JPS56105685A (en) 1981-08-22
JPS6155794B2 JPS6155794B2 (en) 1986-11-29

Family

ID=11665201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP741480A Granted JPS56105685A (en) 1980-01-26 1980-01-26 Monitoring circuit for semiconductor luminous element

Country Status (1)

Country Link
JP (1) JPS56105685A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58222580A (en) * 1982-06-19 1983-12-24 Pioneer Electronic Corp Photooutput control circuit for diode performing luminous function
JPS63115241U (en) * 1987-01-20 1988-07-25
JP2009004788A (en) * 2007-06-21 2009-01-08 Dongbu Hitek Co Ltd Light emitting diode driving circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58222580A (en) * 1982-06-19 1983-12-24 Pioneer Electronic Corp Photooutput control circuit for diode performing luminous function
JPH0530077B2 (en) * 1982-06-19 1993-05-07 Pioneer Electronic Corp
JPS63115241U (en) * 1987-01-20 1988-07-25
JP2009004788A (en) * 2007-06-21 2009-01-08 Dongbu Hitek Co Ltd Light emitting diode driving circuit
US8148903B2 (en) 2007-06-21 2012-04-03 Dongbu Hitek Co., Ltd. Light emitting diode driving circuit

Also Published As

Publication number Publication date
JPS6155794B2 (en) 1986-11-29

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