JPS6451736A - Coherent light communication system - Google Patents

Coherent light communication system

Info

Publication number
JPS6451736A
JPS6451736A JP62208471A JP20847187A JPS6451736A JP S6451736 A JPS6451736 A JP S6451736A JP 62208471 A JP62208471 A JP 62208471A JP 20847187 A JP20847187 A JP 20847187A JP S6451736 A JPS6451736 A JP S6451736A
Authority
JP
Japan
Prior art keywords
light
signal light
clock signal
frequency
multiplex
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
JP62208471A
Other languages
Japanese (ja)
Inventor
Masuo Suyama
Terumi Chikama
Tetsuya Kiyonaga
Yoshito Onoda
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 JP62208471A priority Critical patent/JPS6451736A/en
Publication of JPS6451736A publication Critical patent/JPS6451736A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0226—Fixed carrier allocation, e.g. according to service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0279—WDM point-to-point architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0008—Synchronisation information channels, e.g. clock distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0075—Arrangements for synchronising receiver with transmitter with photonic or optical means

Landscapes

  • Optical Communication System (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To simplify the supply of a clock signal by applying frequency multiplex to a transmission signal light and a clock signal light from a sender side, sending the result to all optical transmission line, mixing the multiplex signal light and the local oscillated light at the receiver side to apply heterodyne detection. CONSTITUTION:A transmission signal light 2 modulated by a transmission signal 1 and a clock signal light 4 modulated by the clock signal 3 are subject to frequency multiplex and the result is sent to the optical transmission line 5. The multiplex signal light 6 sent via an optical transmission line 5 at the reception side and the local oscillated light 7 are mixed and the result is made incident in the photodetector 8 to apply heterodyne detection. Then the detection signal is separated by band pass filters 9,10 having a frequency difference between the frequency of the transmission signal light 2 and the clock signal light 4 and the frequency of the local oscillation light 7 in their pass bond to reproduce the original transmission signal 1 and the clock signal 3.
JP62208471A 1987-08-21 1987-08-21 Coherent light communication system Pending JPS6451736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62208471A JPS6451736A (en) 1987-08-21 1987-08-21 Coherent light communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62208471A JPS6451736A (en) 1987-08-21 1987-08-21 Coherent light communication system

Publications (1)

Publication Number Publication Date
JPS6451736A true JPS6451736A (en) 1989-02-28

Family

ID=16556725

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62208471A Pending JPS6451736A (en) 1987-08-21 1987-08-21 Coherent light communication system

Country Status (1)

Country Link
JP (1) JPS6451736A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060612A (en) * 1990-02-06 1991-10-29 Mitsubishi Denki Kabushiki Kaisha Fuel control apparatus for an internal combustion engine
JPH0448833A (en) * 1990-06-18 1992-02-18 Matsushita Electric Ind Co Ltd System and apparatus for transmitting optical fm coherent light
WO2001080478A1 (en) * 2000-04-19 2001-10-25 Fujitsu Limited Optical clock signal distribution system in wdm network

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060612A (en) * 1990-02-06 1991-10-29 Mitsubishi Denki Kabushiki Kaisha Fuel control apparatus for an internal combustion engine
JPH0448833A (en) * 1990-06-18 1992-02-18 Matsushita Electric Ind Co Ltd System and apparatus for transmitting optical fm coherent light
WO2001080478A1 (en) * 2000-04-19 2001-10-25 Fujitsu Limited Optical clock signal distribution system in wdm network
EP1280294A1 (en) * 2000-04-19 2003-01-29 Fujitsu Limited Optical clock signal distribution system in wdm network
US7024121B2 (en) 2000-04-19 2006-04-04 Fujitsu Limited Optical clock signal distribution system in WDM network
CN100361434C (en) * 2000-04-19 2008-01-09 富士通株式会社 Optical clock signal distribution system in WDM network

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