JPS57102085A - Adjusting method for photo output of semiconductor laser - Google Patents

Adjusting method for photo output of semiconductor laser

Info

Publication number
JPS57102085A
JPS57102085A JP17820880A JP17820880A JPS57102085A JP S57102085 A JPS57102085 A JP S57102085A JP 17820880 A JP17820880 A JP 17820880A JP 17820880 A JP17820880 A JP 17820880A JP S57102085 A JPS57102085 A JP S57102085A
Authority
JP
Japan
Prior art keywords
resistor
temperature
laser diode
semiconductor laser
constant
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
JP17820880A
Other languages
Japanese (ja)
Inventor
Haruo Nagai
Yoshinori Nakano
Kenichiro Takahei
Ganzo Iwane
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP17820880A priority Critical patent/JPS57102085A/en
Publication of JPS57102085A publication Critical patent/JPS57102085A/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
    • H01S5/06804—Stabilisation of laser output parameters by monitoring an external parameter, e.g. temperature

Abstract

PURPOSE:To keep a constant photo output of a semiconductor laser, by a method wherein a resistance, connected in parallel or in series to the semiconductor laser, is caused to change accordig to the temperature. CONSTITUTION:A resistor 2 is connected in parallel to a laser diode 1, and a power source, charging a constant-current, is coupled to the parallel circuit. The laser diode 1 is increased in an oscillating threshold as temperature increases, and thereby a resistor 2, having an appropriate temperature-resistance property is used. Or, if the resistance value of the resistor 2 is adjusted by hand according to the temperature, a current flowing to the laser diode 1, can be kept in a constant manner and the photo output can be kept constantly even if temperature changes. Additionally, the resistor is connected in series to the laser diode and the series circuit may be joined to a power source of a constant voltage.
JP17820880A 1980-12-17 1980-12-17 Adjusting method for photo output of semiconductor laser Pending JPS57102085A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17820880A JPS57102085A (en) 1980-12-17 1980-12-17 Adjusting method for photo output of semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17820880A JPS57102085A (en) 1980-12-17 1980-12-17 Adjusting method for photo output of semiconductor laser

Publications (1)

Publication Number Publication Date
JPS57102085A true JPS57102085A (en) 1982-06-24

Family

ID=16044462

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17820880A Pending JPS57102085A (en) 1980-12-17 1980-12-17 Adjusting method for photo output of semiconductor laser

Country Status (1)

Country Link
JP (1) JPS57102085A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292957A2 (en) * 1987-05-26 1988-11-30 Hughes Aircraft Company Temperature stabilization of laser diodes and light emitting diodes
US5013971A (en) * 1987-05-26 1991-05-07 Hughes Aircraft Company Temperature stabilization of laser diodes and light emitting diodes
US5585988A (en) * 1993-11-27 1996-12-17 Tdk Corporation Tape cassette, tape cassette halves forming mold, and method for preparing a tape cassette
US5626305A (en) * 1991-12-09 1997-05-06 Tdk Corporation Tape cassette having ribs and window

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49104593A (en) * 1973-02-07 1974-10-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49104593A (en) * 1973-02-07 1974-10-03

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292957A2 (en) * 1987-05-26 1988-11-30 Hughes Aircraft Company Temperature stabilization of laser diodes and light emitting diodes
US5013971A (en) * 1987-05-26 1991-05-07 Hughes Aircraft Company Temperature stabilization of laser diodes and light emitting diodes
US5626305A (en) * 1991-12-09 1997-05-06 Tdk Corporation Tape cassette having ribs and window
US5585988A (en) * 1993-11-27 1996-12-17 Tdk Corporation Tape cassette, tape cassette halves forming mold, and method for preparing a tape cassette

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