JPS5647138A - Light loop network by light-wavelength-division multiplex transmission - Google Patents

Light loop network by light-wavelength-division multiplex transmission

Info

Publication number
JPS5647138A
JPS5647138A JP12262979A JP12262979A JPS5647138A JP S5647138 A JPS5647138 A JP S5647138A JP 12262979 A JP12262979 A JP 12262979A JP 12262979 A JP12262979 A JP 12262979A JP S5647138 A JPS5647138 A JP S5647138A
Authority
JP
Japan
Prior art keywords
light
lambda2
lambda1
wavelength
light wave
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.)
Granted
Application number
JP12262979A
Other languages
Japanese (ja)
Other versions
JPS6141184B2 (en
Inventor
Kiyoshi Nosu
Tetsuya Miki
Koichi Asatani
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP12262979A priority Critical patent/JPS5647138A/en
Publication of JPS5647138A publication Critical patent/JPS5647138A/en
Publication of JPS6141184B2 publication Critical patent/JPS6141184B2/ja
Granted 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4246—Bidirectionally operating package structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0283—WDM ring architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
    • G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
    • G02B6/29362—Serial cascade of filters or filtering operations, e.g. for a large number of channels
    • G02B6/29365—Serial cascade of filters or filtering operations, e.g. for a large number of channels in a multireflection configuration, i.e. beam following a zigzag path between filters or filtering operations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • 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 make it possible to constitute many communication channels with one loop light line by applying the technique of light-wavelength multiplex transmission. CONSTITUTION:Center 1, and communication terminals 2, 3 and 4 are coupled in a loop via loop light line 10; and a light wave of wavelength lambda1 is permitted to propagate through line 10 clockwise, and that of lambda2 counterclockwise. At each communication terminal, light waves of lambda1 and lambda2 from light lines 10' and 10'' are partially extracted and applied to photoelectric converters 47 and 47' by light filter 31 that transmits partially the light wave of lambda1 while reflecting the rest and further provides the total reflection of the other light wave of lambda2 and light filter 32 that transmits part of the light wave of lambda2 while reflecting the rest and further provides the total reflection of the light wave of lambda1; and light waves lambda1 and lambda2 from electro- optic converters 46 and 46' are sent to light lines 10'' and 10' respectively, and partially supplied to photoelectric converters 47 and 47'.
JP12262979A 1979-09-26 1979-09-26 Light loop network by light-wavelength-division multiplex transmission Granted JPS5647138A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12262979A JPS5647138A (en) 1979-09-26 1979-09-26 Light loop network by light-wavelength-division multiplex transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12262979A JPS5647138A (en) 1979-09-26 1979-09-26 Light loop network by light-wavelength-division multiplex transmission

Publications (2)

Publication Number Publication Date
JPS5647138A true JPS5647138A (en) 1981-04-28
JPS6141184B2 JPS6141184B2 (en) 1986-09-12

Family

ID=14840691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12262979A Granted JPS5647138A (en) 1979-09-26 1979-09-26 Light loop network by light-wavelength-division multiplex transmission

Country Status (1)

Country Link
JP (1) JPS5647138A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58117738A (en) * 1981-12-31 1983-07-13 Fujitsu Ltd Optical loop transmitting system
JPH04234244A (en) * 1990-08-02 1992-08-21 American Teleph & Telegr Co <Att> Communication network

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58117738A (en) * 1981-12-31 1983-07-13 Fujitsu Ltd Optical loop transmitting system
JPH04234244A (en) * 1990-08-02 1992-08-21 American Teleph & Telegr Co <Att> Communication network

Also Published As

Publication number Publication date
JPS6141184B2 (en) 1986-09-12

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