JPS573445A - Signal multiplex optical transmitter - Google Patents

Signal multiplex optical transmitter

Info

Publication number
JPS573445A
JPS573445A JP7747080A JP7747080A JPS573445A JP S573445 A JPS573445 A JP S573445A JP 7747080 A JP7747080 A JP 7747080A JP 7747080 A JP7747080 A JP 7747080A JP S573445 A JPS573445 A JP S573445A
Authority
JP
Japan
Prior art keywords
signal
frequency
subsignal
circuit
light
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
JP7747080A
Other languages
Japanese (ja)
Inventor
Yoshio Ogushi
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 JP7747080A priority Critical patent/JPS573445A/en
Publication of JPS573445A publication Critical patent/JPS573445A/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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems

Landscapes

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

Abstract

PURPOSE:To decrease the subsignal component, by converting a signal having an integer times the frequency of a clock signal and subjected to phase modulation with a subsignal to be transmitted, into light with another light source for that of a main signal, and transmitting it with the main signal light after synthesis. CONSTITUTION:An output signal of a phase comparison circuit 17 in which a clock signal at a terminal 15 and an output signal of a frequency-dividing circuit 16 are phase-compared, is added at an addition circuit 19 with a subsignal to be transmitted from a terminal 18. This signal is fed to a voltage variable frequency oscillating circuit 21 to control the oscillating frequency and converts it into a signal having an integer times frequency of the clock signal and subjected to phase modulation with the subsignal, by the frequency division in an arbitrary integer at the frequency dividng circuit 16. This signal is converted into light at a light source 23 via a driving circuit 22 and transmitted to a photocoupler 25 via an optical fiber 24 and outputted to an external fiber line 26 after being synthesized with a main signal light transmitted through an optical fiber 14. Thus, the transmission of optical subsignal can be made without interference from the main signal and with less reduction in signal component.
JP7747080A 1980-06-09 1980-06-09 Signal multiplex optical transmitter Pending JPS573445A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7747080A JPS573445A (en) 1980-06-09 1980-06-09 Signal multiplex optical transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7747080A JPS573445A (en) 1980-06-09 1980-06-09 Signal multiplex optical transmitter

Publications (1)

Publication Number Publication Date
JPS573445A true JPS573445A (en) 1982-01-08

Family

ID=13634865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7747080A Pending JPS573445A (en) 1980-06-09 1980-06-09 Signal multiplex optical transmitter

Country Status (1)

Country Link
JP (1) JPS573445A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0280144A (en) * 1988-09-16 1990-03-20 Asahi Seiki Kogyo Kk Forming method for loop of wire rod
KR100743112B1 (en) 2006-10-20 2007-07-27 김정현 Sensor for bed-wetting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0280144A (en) * 1988-09-16 1990-03-20 Asahi Seiki Kogyo Kk Forming method for loop of wire rod
KR100743112B1 (en) 2006-10-20 2007-07-27 김정현 Sensor for bed-wetting

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