JPS56112142A - Wave length multistar type network - Google Patents

Wave length multistar type network

Info

Publication number
JPS56112142A
JPS56112142A JP1584280A JP1584280A JPS56112142A JP S56112142 A JPS56112142 A JP S56112142A JP 1584280 A JP1584280 A JP 1584280A JP 1584280 A JP1584280 A JP 1584280A JP S56112142 A JPS56112142 A JP S56112142A
Authority
JP
Japan
Prior art keywords
wave length
station
light
stations
plural
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
JP1584280A
Other languages
Japanese (ja)
Inventor
Taro Shibagaki
Takeshi Koseki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1584280A priority Critical patent/JPS56112142A/en
Publication of JPS56112142A publication Critical patent/JPS56112142A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To avoid the collision of data by performing a communication by the use of a light wave having the same center wave length as the receiving wave length of the other station, when transmission is executed. CONSTITUTION:A light receiver 43 having no wave length selectivity, and a light transmitter 44 having 1 or plural light emitting elements for generating a light beam mutually different center wave length are provided on plural stations 41a-41f. These stations are coupled with the light transmission line 45 through the star coupler 42. In case the station 41a communicate with the station 41c, the transmission wave length from he transmitter 44 of the station 41a is made lambdac so that a signal of the station 41a is selectively transmitted to only the station 41c. Therefore, there is no limit of the number of stations, which is accompanied by attenuation of light due to the distribution, it becomes easy to change to plural stations, and the collision of data is not caused.
JP1584280A 1980-02-12 1980-02-12 Wave length multistar type network Pending JPS56112142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1584280A JPS56112142A (en) 1980-02-12 1980-02-12 Wave length multistar type network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1584280A JPS56112142A (en) 1980-02-12 1980-02-12 Wave length multistar type network

Publications (1)

Publication Number Publication Date
JPS56112142A true JPS56112142A (en) 1981-09-04

Family

ID=11900075

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1584280A Pending JPS56112142A (en) 1980-02-12 1980-02-12 Wave length multistar type network

Country Status (1)

Country Link
JP (1) JPS56112142A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58129844A (en) * 1982-01-27 1983-08-03 Toshiba Corp Optical demultiplexer
US4530084A (en) * 1981-10-08 1985-07-16 Heinrich Hertz Institut Fuer Nachrichten Technik Communications network with optical channels
JPS6152107A (en) * 1984-08-22 1986-03-14 株式会社日立製作所 Protecting relay system
JPS61193528A (en) * 1985-02-22 1986-08-28 Nippon Telegr & Teleph Corp <Ntt> Optical communication network
JPS62136138A (en) * 1985-09-19 1987-06-19 ザ・マイタ・コ−ポレイシヨン Optical fiber local area network with active star junction as its center
JPS6442934A (en) * 1987-08-10 1989-02-15 Nippon Telegraph & Telephone Optical communication system
JPS6482834A (en) * 1987-09-25 1989-03-28 Canon Kk Optical communication system
JPH0256130A (en) * 1988-08-22 1990-02-26 Nippon Telegr & Teleph Corp <Ntt> Optical ring network
JPH0275246A (en) * 1988-09-12 1990-03-14 Nippon Telegr & Teleph Corp <Ntt> Optical star type communication system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530084A (en) * 1981-10-08 1985-07-16 Heinrich Hertz Institut Fuer Nachrichten Technik Communications network with optical channels
JPS58129844A (en) * 1982-01-27 1983-08-03 Toshiba Corp Optical demultiplexer
JPS6152107A (en) * 1984-08-22 1986-03-14 株式会社日立製作所 Protecting relay system
JPH0458255B2 (en) * 1984-08-22 1992-09-17 Hitachi Ltd
JPS61193528A (en) * 1985-02-22 1986-08-28 Nippon Telegr & Teleph Corp <Ntt> Optical communication network
JPH0316052B2 (en) * 1985-02-22 1991-03-04 Nippon Telegraph & Telephone
JPS62136138A (en) * 1985-09-19 1987-06-19 ザ・マイタ・コ−ポレイシヨン Optical fiber local area network with active star junction as its center
JPS6442934A (en) * 1987-08-10 1989-02-15 Nippon Telegraph & Telephone Optical communication system
JPS6482834A (en) * 1987-09-25 1989-03-28 Canon Kk Optical communication system
JPH0256130A (en) * 1988-08-22 1990-02-26 Nippon Telegr & Teleph Corp <Ntt> Optical ring network
JPH0275246A (en) * 1988-09-12 1990-03-14 Nippon Telegr & Teleph Corp <Ntt> Optical star type communication system

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