JPS5760762A - Asynchronous high-speed digital optical communication system - Google Patents

Asynchronous high-speed digital optical communication system

Info

Publication number
JPS5760762A
JPS5760762A JP55133698A JP13369880A JPS5760762A JP S5760762 A JPS5760762 A JP S5760762A JP 55133698 A JP55133698 A JP 55133698A JP 13369880 A JP13369880 A JP 13369880A JP S5760762 A JPS5760762 A JP S5760762A
Authority
JP
Japan
Prior art keywords
light
communication system
low
receiving side
output
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
JP55133698A
Other languages
Japanese (ja)
Inventor
Yukimi Takao
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP55133698A priority Critical patent/JPS5760762A/en
Publication of JPS5760762A publication Critical patent/JPS5760762A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying

Abstract

PURPOSE:To obtain an optical communication system where a superior communication is possible even for a high-speed and low-S//N weak light, by adopting a system strong against S//N which is a merit of frequency shift to raise outputs in the light transmitting side and the light receiving side. CONSTITUTION:1 and 0 of the digital signal are received by a line receiver 1, and the voltage of a frequency shift oscillator 2 is controlled to oscillate two high frequencies corresponding to 1 and 0, and these frequencies are applied to a double balanced mixer 3, and a low frequency of the difference between the output of the mixer 3 and the output of a local oscillator 6 is taken out by an LPF4 to cause a light emitting diode to emit the light through an output amplifier 5, thus transmitting the signal to optical fibers. The digital signal transmitted to optical fibers is received by the receiving device in the receiving side, and thus, outputs in the transmission side and the receiving side are raised to perform a superior communication by a high-speed and low-S//N weak light.
JP55133698A 1980-09-27 1980-09-27 Asynchronous high-speed digital optical communication system Pending JPS5760762A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55133698A JPS5760762A (en) 1980-09-27 1980-09-27 Asynchronous high-speed digital optical communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55133698A JPS5760762A (en) 1980-09-27 1980-09-27 Asynchronous high-speed digital optical communication system

Publications (1)

Publication Number Publication Date
JPS5760762A true JPS5760762A (en) 1982-04-12

Family

ID=15110787

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55133698A Pending JPS5760762A (en) 1980-09-27 1980-09-27 Asynchronous high-speed digital optical communication system

Country Status (1)

Country Link
JP (1) JPS5760762A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0509500A2 (en) * 1991-04-19 1992-10-21 Ascom Tech Ag Device for bidirectional simultaneous transmission of digital information

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0509500A2 (en) * 1991-04-19 1992-10-21 Ascom Tech Ag Device for bidirectional simultaneous transmission of digital information
EP0509500A3 (en) * 1991-04-19 1993-04-21 Ascom Tech Ag Device for bidirectional simultaneous transmission of digital information

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