JPS57157643A - Optical communication device - Google Patents

Optical communication device

Info

Publication number
JPS57157643A
JPS57157643A JP56042299A JP4229981A JPS57157643A JP S57157643 A JPS57157643 A JP S57157643A JP 56042299 A JP56042299 A JP 56042299A JP 4229981 A JP4229981 A JP 4229981A JP S57157643 A JPS57157643 A JP S57157643A
Authority
JP
Japan
Prior art keywords
signal
light
converter
signals
subordinate
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
JP56042299A
Other languages
Japanese (ja)
Inventor
Hajime Konohi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56042299A priority Critical patent/JPS57157643A/en
Publication of JPS57157643A publication Critical patent/JPS57157643A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • 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
    • H04B10/516—Details of coding or modulation
    • H04B10/524—Pulse modulation

Landscapes

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

Abstract

PURPOSE:To easily separate and extract signals by transmitting signals through one light transmitting path, by converting the transmitted optical signals in which the main signal and a subordinate signal are coupled together after they are converted into lights, into electric signals at the receiving side, and by separating said electric signals into low frequency components and PCM base band signals. CONSTITUTION:An electrooptic converter 1 for main signal converts an electric pulse signal, such as a PCM signal, etc., which is a main signal A, into an optical pulse. An electrooptic converter for subordinate signal 2 converts a low frequency signal which is a subordinate signal C having a frequency which is lower than the pulse signal of the signal A, into a light having an intensity corresponding to the amplitude. A light coupler 3 couples the output light of the converter 1 and that of the converter 2 together. A photoelectric converter 8 receives the output light from the coupler 3 through a light transmitting path 7, and converts the output light into an electric signal in accordance with the quantity of the light thus received. A separating device 9 separates and extracts a main signal G and a subordinate signal H from the output signal of the converter 8.
JP56042299A 1981-03-25 1981-03-25 Optical communication device Pending JPS57157643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56042299A JPS57157643A (en) 1981-03-25 1981-03-25 Optical communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56042299A JPS57157643A (en) 1981-03-25 1981-03-25 Optical communication device

Publications (1)

Publication Number Publication Date
JPS57157643A true JPS57157643A (en) 1982-09-29

Family

ID=12632141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56042299A Pending JPS57157643A (en) 1981-03-25 1981-03-25 Optical communication device

Country Status (1)

Country Link
JP (1) JPS57157643A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54112103A (en) * 1978-02-23 1979-09-01 Fujitsu Ltd Light bipolar communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54112103A (en) * 1978-02-23 1979-09-01 Fujitsu Ltd Light bipolar communication system

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