JPS55120238A - Loop system optical communication system - Google Patents

Loop system optical communication system

Info

Publication number
JPS55120238A
JPS55120238A JP2713679A JP2713679A JPS55120238A JP S55120238 A JPS55120238 A JP S55120238A JP 2713679 A JP2713679 A JP 2713679A JP 2713679 A JP2713679 A JP 2713679A JP S55120238 A JPS55120238 A JP S55120238A
Authority
JP
Japan
Prior art keywords
light
circuit path
switch
stations
delay element
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
JP2713679A
Other languages
Japanese (ja)
Inventor
Tomoo Kokkyo
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 JP2713679A priority Critical patent/JPS55120238A/en
Publication of JPS55120238A publication Critical patent/JPS55120238A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H04J14/0204—Broadcast and select arrangements, e.g. with an optical splitter at the input before adding or dropping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H04J14/0205—Select and combine arrangements, e.g. with an optical combiner at the output after adding or dropping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
    • H04J14/0212—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM] using optical switches or wavelength selective switches [WSS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/009—Topology aspects
    • H04Q2011/0092—Ring

Abstract

PURPOSE:To simplify handling, to improve reliability, and to prevent data from colliding on a circuit path by providing light switches and by erasing a returned light signal from the circuit path by the light switches. CONSTITUTION:Stations S1j (j=1-n) are connected together via glass fibers in a loop and computer C1j is added to each S1j. Light switch 3 is added to S1j and between the light intake and outlet of S1j, light branching device 1, light delay element 2, swtich 3, light delay element 4 and light inserting device 5 are sequentially connected in series. Switch 3 is that which uses a phase matching modulator making use of electro-optical characteristics of LiTaO3 crystal, etc., and since devices 1 and 5, and elements 2 and 4 are all made of glass fiber, S1j is composed of passive elements eventually, improving the reliability. Further, a signal which is sent out from S1j and returned via the entire circuit path after passing through other stations is detected by reception processing circuit 7 and erased from the circuit path by switch 3.
JP2713679A 1979-03-08 1979-03-08 Loop system optical communication system Pending JPS55120238A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2713679A JPS55120238A (en) 1979-03-08 1979-03-08 Loop system optical communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2713679A JPS55120238A (en) 1979-03-08 1979-03-08 Loop system optical communication system

Publications (1)

Publication Number Publication Date
JPS55120238A true JPS55120238A (en) 1980-09-16

Family

ID=12212628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2713679A Pending JPS55120238A (en) 1979-03-08 1979-03-08 Loop system optical communication system

Country Status (1)

Country Link
JP (1) JPS55120238A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681397A (en) * 1985-06-28 1987-07-21 Amp Incorporated Optical switching arrangement
US4761832A (en) * 1985-06-28 1988-08-02 Amp Incorporated Fiber optic switching network
JP2011041175A (en) * 2009-08-18 2011-02-24 Nippon Telegr & Teleph Corp <Ntt> Optical transmission system, device and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681397A (en) * 1985-06-28 1987-07-21 Amp Incorporated Optical switching arrangement
US4761832A (en) * 1985-06-28 1988-08-02 Amp Incorporated Fiber optic switching network
JP2011041175A (en) * 2009-08-18 2011-02-24 Nippon Telegr & Teleph Corp <Ntt> Optical transmission system, device and method

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