JPS5683151A - Optical transmission system - Google Patents

Optical transmission system

Info

Publication number
JPS5683151A
JPS5683151A JP15950279A JP15950279A JPS5683151A JP S5683151 A JPS5683151 A JP S5683151A JP 15950279 A JP15950279 A JP 15950279A JP 15950279 A JP15950279 A JP 15950279A JP S5683151 A JPS5683151 A JP S5683151A
Authority
JP
Japan
Prior art keywords
signal
transmission
reception
reception section
oscillation signal
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
JP15950279A
Other languages
Japanese (ja)
Inventor
Takahiko Nishizawa
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.)
Kokusai Denki Electric Inc
Original Assignee
Yagi Antenna 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 Yagi Antenna Co Ltd filed Critical Yagi Antenna Co Ltd
Priority to JP15950279A priority Critical patent/JPS5683151A/en
Publication of JPS5683151A publication Critical patent/JPS5683151A/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
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25751—Optical arrangements for CATV or video distribution

Landscapes

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

Abstract

PURPOSE:To avoid the shift in the original signals at transmission and reception, by transmitting the signal in the local oscillator at frequency conversion of the transmission section to the reception section at the same time, and using this signal as the local oscillation signal at the reception section through the branch and amplification of this signal at the reception section. CONSTITUTION:TV signal f0 and the oscillation signal fL from the local oscillator 5 are mixed at a mixer 2 of a transmission section frequency converter 21, the original signal is converted into optical signal at photomodulator 4, and the oscillation signal fL is converted into optical signal at the same time and transmitted on a phototransmission line 6. The photosignal from the transmission line 6 is demodulated into electric signal at a photodemodulator 7 at the reception section 24 to obtain the original TV signal f0 and the oscillation signal fL. This oscillation signal fL is fed to an amplifier 12 of a reception section frequency converter 22, and at the mixer 8 of the converter 22, the TV signal F0 from the demodulator 7 and the oscillation signal FL from the amplifier 12 are mixed, and the result is frequency-converted to picture the TV signal f0 on the TV receiver 10. Further, the shift in the originals at transmission and reception is avoided to reproduce excellent video.
JP15950279A 1979-12-08 1979-12-08 Optical transmission system Pending JPS5683151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15950279A JPS5683151A (en) 1979-12-08 1979-12-08 Optical transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15950279A JPS5683151A (en) 1979-12-08 1979-12-08 Optical transmission system

Publications (1)

Publication Number Publication Date
JPS5683151A true JPS5683151A (en) 1981-07-07

Family

ID=15695162

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15950279A Pending JPS5683151A (en) 1979-12-08 1979-12-08 Optical transmission system

Country Status (1)

Country Link
JP (1) JPS5683151A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01149533A (en) * 1987-10-29 1989-06-12 Alcatel Thomson Espace Electric wave-optical wave transmission system especially for space communication

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54114005A (en) * 1978-02-24 1979-09-05 Nippon Telegr & Teleph Corp <Ntt> Optical communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54114005A (en) * 1978-02-24 1979-09-05 Nippon Telegr & Teleph Corp <Ntt> Optical communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01149533A (en) * 1987-10-29 1989-06-12 Alcatel Thomson Espace Electric wave-optical wave transmission system especially for space communication

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