JPS57162479A - Semiconductor laser diode driving circuit - Google Patents

Semiconductor laser diode driving circuit

Info

Publication number
JPS57162479A
JPS57162479A JP56048046A JP4804681A JPS57162479A JP S57162479 A JPS57162479 A JP S57162479A JP 56048046 A JP56048046 A JP 56048046A JP 4804681 A JP4804681 A JP 4804681A JP S57162479 A JPS57162479 A JP S57162479A
Authority
JP
Japan
Prior art keywords
diode
transmitted
circuit
semiconductor laser
laser diode
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
JP56048046A
Other languages
Japanese (ja)
Inventor
Kuniyoshi Konishi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56048046A priority Critical patent/JPS57162479A/en
Publication of JPS57162479A publication Critical patent/JPS57162479A/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
    • H01S5/06825—Protecting the laser, e.g. during switch-on/off, detection of malfunctioning or degradation

Landscapes

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

Abstract

PURPOSE:To prolong the life of diode by a method wherein the bias current to be supplied for the semiconductor laser diode is disconnected when there is no digital output to be transmitted for the specified time. CONSTITUTION:The gate 101, the switch circuit 102 comprising the transistor Q1 and Q2, the bias current circuit 104 including the transistor Q3, the PIN diode 105 connected in inverse parallel and the semiconductor laser diode 103 are provided on the space between the signal DOS to be transmitted and the photo fiber generating the photo output to be transmitted. On the other hand, the series circuit to the comparator 107 and the smooth circuit 106 is connected to the wiring between the circuit 104 and the diode group. Through these procedures, when the signal DOS is being transmitted, the photo fiber 108 coupled with the diode 103 generates the signal output and when the signal output is disconnected, said photo fiber 108 transmits the signal output from the retriggerble oneshot multiplexer 301 shunted from the signal DOS to the transistor Q3 through the intermediary of the gate 302 disconnecting the bias current to the diode group.
JP56048046A 1981-03-31 1981-03-31 Semiconductor laser diode driving circuit Pending JPS57162479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56048046A JPS57162479A (en) 1981-03-31 1981-03-31 Semiconductor laser diode driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56048046A JPS57162479A (en) 1981-03-31 1981-03-31 Semiconductor laser diode driving circuit

Publications (1)

Publication Number Publication Date
JPS57162479A true JPS57162479A (en) 1982-10-06

Family

ID=12792379

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56048046A Pending JPS57162479A (en) 1981-03-31 1981-03-31 Semiconductor laser diode driving circuit

Country Status (1)

Country Link
JP (1) JPS57162479A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4807239A (en) * 1986-04-03 1989-02-21 Copal Electronics Co., Ltd. Drive and control circuit for laser diode
US4819241A (en) * 1985-08-16 1989-04-04 Kabushiki Kaisha Toshiba Laser diode driving circuit
JPH05206954A (en) * 1992-01-28 1993-08-13 Mitsubishi Electric Corp Light-transmitter/receiver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4819241A (en) * 1985-08-16 1989-04-04 Kabushiki Kaisha Toshiba Laser diode driving circuit
US4807239A (en) * 1986-04-03 1989-02-21 Copal Electronics Co., Ltd. Drive and control circuit for laser diode
JPH05206954A (en) * 1992-01-28 1993-08-13 Mitsubishi Electric Corp Light-transmitter/receiver

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