JPS5450203A - Transmitter for optical fiber communication - Google Patents

Transmitter for optical fiber communication

Info

Publication number
JPS5450203A
JPS5450203A JP11557177A JP11557177A JPS5450203A JP S5450203 A JPS5450203 A JP S5450203A JP 11557177 A JP11557177 A JP 11557177A JP 11557177 A JP11557177 A JP 11557177A JP S5450203 A JPS5450203 A JP S5450203A
Authority
JP
Japan
Prior art keywords
signal
output
light emission
emission element
amplifier
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
JP11557177A
Other languages
Japanese (ja)
Inventor
Makoto Tachikawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11557177A priority Critical patent/JPS5450203A/en
Publication of JPS5450203A publication Critical patent/JPS5450203A/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)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To compensate the efficiency deterioration of a light emission element and make trouble detection possible by controlling the transmission power by a part of the output of the light emission element. CONSTITUTION:Modulated signal 1 is applied to light emission element 3 through transmission amplifier 2, and optical output 4 is transmitted to fiber 5. Then, a part of optical output 4 is made incident onto photo detection element 12 through feedback optical fiber 11, and the output is caused to pass through receiving amplifier 13 to obtain power feedback signal 7. Then, the difference between this signal and power command signal 6 is defined as power control signal 8, and signal 8 is applied to amplifier 2. As a result, the output deterioration of the light emission element dependent upon elapse of years can be compensated and trouble detection is possible.
JP11557177A 1977-09-28 1977-09-28 Transmitter for optical fiber communication Pending JPS5450203A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11557177A JPS5450203A (en) 1977-09-28 1977-09-28 Transmitter for optical fiber communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11557177A JPS5450203A (en) 1977-09-28 1977-09-28 Transmitter for optical fiber communication

Publications (1)

Publication Number Publication Date
JPS5450203A true JPS5450203A (en) 1979-04-20

Family

ID=14665849

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11557177A Pending JPS5450203A (en) 1977-09-28 1977-09-28 Transmitter for optical fiber communication

Country Status (1)

Country Link
JP (1) JPS5450203A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58121499A (en) * 1982-01-13 1983-07-19 日本放送協会 Signal transmission system by optical fiber
EP0134425A2 (en) * 1983-06-10 1985-03-20 Siemens Aktiengesellschaft Connecting device for optical wave guides
US4549314A (en) * 1981-12-25 1985-10-22 Canon Kabushiki Kaisha Optical communication apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4549314A (en) * 1981-12-25 1985-10-22 Canon Kabushiki Kaisha Optical communication apparatus
JPS58121499A (en) * 1982-01-13 1983-07-19 日本放送協会 Signal transmission system by optical fiber
JPH0148707B2 (en) * 1982-01-13 1989-10-20 Nippon Hoso Kyokai
EP0134425A2 (en) * 1983-06-10 1985-03-20 Siemens Aktiengesellschaft Connecting device for optical wave guides
EP0134425B1 (en) * 1983-06-10 1988-11-02 Siemens Aktiengesellschaft Connecting device for optical wave guides

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