JPS57171853A - Laser diode driving circuit - Google Patents

Laser diode driving circuit

Info

Publication number
JPS57171853A
JPS57171853A JP56057664A JP5766481A JPS57171853A JP S57171853 A JPS57171853 A JP S57171853A JP 56057664 A JP56057664 A JP 56057664A JP 5766481 A JP5766481 A JP 5766481A JP S57171853 A JPS57171853 A JP S57171853A
Authority
JP
Japan
Prior art keywords
current
laser diode
circuit
bias current
loaded
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
JP56057664A
Other languages
Japanese (ja)
Inventor
Masayuki Goto
Takashi Kihara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56057664A priority Critical patent/JPS57171853A/en
Publication of JPS57171853A publication Critical patent/JPS57171853A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To lighten the burden of the Zener diode of a constant-voltage circuit, by connecting a compensating circuit for loaded fluctuating current to a generating circuit for laser diode bias current. CONSTITUTION:A laser diode 5 oscillates lights based on a signal current which arrives at a terminal (d), and a generating circuit 6 for laser diode bias current supplies a bias current IB to the laser diode 5. A bias current controlling voltage is impressed from a terminal (f). A controlling circuit 7 for loaded current compensation is provided in parallel to the generating circuit 6 for laser diode bias current. This controlling circuit 7 for loaded current compensation uses bias currents which are the same level as a DC-DC converter in the bias current generating circuit 6 and which have inversional characteristics. When the bias current IB changes as the threshold of the laser diode 5 changes due to temperature change, an electric current IX which compensates the changed quantity flows from the controlling circuit 7 for loaded current sompensation.
JP56057664A 1981-04-16 1981-04-16 Laser diode driving circuit Pending JPS57171853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56057664A JPS57171853A (en) 1981-04-16 1981-04-16 Laser diode driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56057664A JPS57171853A (en) 1981-04-16 1981-04-16 Laser diode driving circuit

Publications (1)

Publication Number Publication Date
JPS57171853A true JPS57171853A (en) 1982-10-22

Family

ID=13062164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56057664A Pending JPS57171853A (en) 1981-04-16 1981-04-16 Laser diode driving circuit

Country Status (1)

Country Link
JP (1) JPS57171853A (en)

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