JPS5658342A - Transmission system of optical data - Google Patents

Transmission system of optical data

Info

Publication number
JPS5658342A
JPS5658342A JP13485079A JP13485079A JPS5658342A JP S5658342 A JPS5658342 A JP S5658342A JP 13485079 A JP13485079 A JP 13485079A JP 13485079 A JP13485079 A JP 13485079A JP S5658342 A JPS5658342 A JP S5658342A
Authority
JP
Japan
Prior art keywords
signal
reception circuit
component
wave length
optical
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
JP13485079A
Other languages
Japanese (ja)
Inventor
Takeshi Usui
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 JP13485079A priority Critical patent/JPS5658342A/en
Publication of JPS5658342A publication Critical patent/JPS5658342A/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
    • H04B10/2589—Bidirectional transmission

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 enable long distance transmission of optical data, by cancelling the effect of reflecting wave produced on the way of optical transmission line so that an incident light is split into two depending on the wave length and the signal difference is received. CONSTITUTION:A reception circuit 20 branches an incident light 201 into a signal 202 taking short wave compoenent as the main component at an optical branch device 21 and a signal 203 taking the long wave length compenent as the major component, and the signal difference is received at a reception circuit 24. The interference light reflected on the way of an optical transmission line 2 has the same spectral distribution as an light source 10 and it is cancelled in receiving signal difference at an photo reception circuit 20. On the other hand, the signal component modulated and returned at a transmission signal 301 is only short wave length component, then no cancellation is made.
JP13485079A 1979-10-18 1979-10-18 Transmission system of optical data Pending JPS5658342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13485079A JPS5658342A (en) 1979-10-18 1979-10-18 Transmission system of optical data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13485079A JPS5658342A (en) 1979-10-18 1979-10-18 Transmission system of optical data

Publications (1)

Publication Number Publication Date
JPS5658342A true JPS5658342A (en) 1981-05-21

Family

ID=15137924

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13485079A Pending JPS5658342A (en) 1979-10-18 1979-10-18 Transmission system of optical data

Country Status (1)

Country Link
JP (1) JPS5658342A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62245740A (en) * 1986-04-17 1987-10-27 Nec Corp Wavelength multiplex optical transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62245740A (en) * 1986-04-17 1987-10-27 Nec Corp Wavelength multiplex optical transmission system

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