JPS55107285A - Semiconductor laser driving circuit - Google Patents

Semiconductor laser driving circuit

Info

Publication number
JPS55107285A
JPS55107285A JP1384879A JP1384879A JPS55107285A JP S55107285 A JPS55107285 A JP S55107285A JP 1384879 A JP1384879 A JP 1384879A JP 1384879 A JP1384879 A JP 1384879A JP S55107285 A JPS55107285 A JP S55107285A
Authority
JP
Japan
Prior art keywords
resistance
laser
resistor
bridge
photooutput
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
JP1384879A
Other languages
Japanese (ja)
Inventor
Kenji Takemoto
Takeshi Ito
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 JP1384879A priority Critical patent/JPS55107285A/en
Publication of JPS55107285A publication Critical patent/JPS55107285A/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 stabilize laser photooutput by offsetting resistance variation due to temperature changes, by composing resistance, which constitutes an error voltage detecting bridge, of a bulk resistance having the same composition as a semiconductor laser. CONSTITUTION:A laser's photooutput stabilizing circuit is composed of an error voltage detecting bridge consisting of a semiconductor element 1, a resistor 3, a variable resistor 4 and DC intercepting capacitors 5 and 5'. In this mechanism, the laser element 1 is driven by a signal current 2, the voltage having been detected by the bridge is amplified by a differential amplifier 6, and then, a bias current Ib is controlled by using a bias current control circuit 7. In this mechanism, while the laser element 1 is made up of a bulk resistance 8 and an active layer pn-junction 9, of these, the resistor 8 and a bridge resistor 3 are to be left as the bulk resistances of the same composition. Since temperature variation coefficients of these resistances are to become equal in this manner, it is possible to offset the resistance variations and therefore to stabilize the photooutput.
JP1384879A 1979-02-10 1979-02-10 Semiconductor laser driving circuit Pending JPS55107285A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1384879A JPS55107285A (en) 1979-02-10 1979-02-10 Semiconductor laser driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1384879A JPS55107285A (en) 1979-02-10 1979-02-10 Semiconductor laser driving circuit

Publications (1)

Publication Number Publication Date
JPS55107285A true JPS55107285A (en) 1980-08-16

Family

ID=11844690

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1384879A Pending JPS55107285A (en) 1979-02-10 1979-02-10 Semiconductor laser driving circuit

Country Status (1)

Country Link
JP (1) JPS55107285A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683573A (en) * 1985-09-24 1987-07-28 Bell Communications Research, Inc. Temperature stabilization of injection lasers
US6590686B1 (en) 1998-12-24 2003-07-08 Fujitsu Limited Optical transmitter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683573A (en) * 1985-09-24 1987-07-28 Bell Communications Research, Inc. Temperature stabilization of injection lasers
US6590686B1 (en) 1998-12-24 2003-07-08 Fujitsu Limited Optical transmitter

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