JPS56155902A - Optical wave coupling and branching filter - Google Patents

Optical wave coupling and branching filter

Info

Publication number
JPS56155902A
JPS56155902A JP5865880A JP5865880A JPS56155902A JP S56155902 A JPS56155902 A JP S56155902A JP 5865880 A JP5865880 A JP 5865880A JP 5865880 A JP5865880 A JP 5865880A JP S56155902 A JPS56155902 A JP S56155902A
Authority
JP
Japan
Prior art keywords
optical fibers
diffraction grating
transmission
optical fiber
differing
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
JP5865880A
Other languages
Japanese (ja)
Inventor
Kiyoshi Nosu
Tetsuya Miki
Ryuichi Watanabe
Kenichi Sato
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 JP5865880A priority Critical patent/JPS56155902A/en
Publication of JPS56155902A publication Critical patent/JPS56155902A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G02B6/29304—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 diffraction, e.g. grating
    • G02B6/29305—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 diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/29308—Diffractive element having focusing properties, e.g. curved gratings
    • 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
    • G02B6/29304—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 diffraction, e.g. grating
    • G02B6/29305—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 diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/2931—Diffractive element operating in reflection
    • 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
    • G02B6/29379—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 characterised by the function or use of the complete device
    • G02B6/2938—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 characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM

Abstract

PURPOSE:To branch and couple light waves differing in wavelength by providing a line of optical fibers differing in size and a diffraction grating. CONSTITUTION:This device has concave diffraction grating 10, single optical fiber 1 for transmission arranged where it is coupled optically with the concave surface, optical fibers 2 and 3 for composite wave input, and optical fibers 4 and 5 for branched wave output. Then, the diameter of the high-refractive-index layer of optical fiber 1 for transmission is less than those of optical fibers 2 and 3 for composite wave input, and light having different wavelengths from optical fiber 1 for transmission is branched to optical fibers 4 and 5 for branches wave output via concave diffraction grating 10; and lights differing in wavelength from optical fibers 2 and 3 for composite wave input are coupled with optical fiber 1 for transmission via concave diffraction grating 10.
JP5865880A 1980-05-06 1980-05-06 Optical wave coupling and branching filter Pending JPS56155902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5865880A JPS56155902A (en) 1980-05-06 1980-05-06 Optical wave coupling and branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5865880A JPS56155902A (en) 1980-05-06 1980-05-06 Optical wave coupling and branching filter

Publications (1)

Publication Number Publication Date
JPS56155902A true JPS56155902A (en) 1981-12-02

Family

ID=13090684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5865880A Pending JPS56155902A (en) 1980-05-06 1980-05-06 Optical wave coupling and branching filter

Country Status (1)

Country Link
JP (1) JPS56155902A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621894A (en) * 1984-06-13 1986-11-11 Lignes Telegraphiques Et Telephoniques L.T.T. A device for distributing light energy including at least one inlet fiber with a chamfered outlet end and a diffraction grating, and application thereof to optical switching
US4739501A (en) * 1984-09-01 1988-04-19 Alcatel N.V. Optical multiplexer/demultiplexer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621894A (en) * 1984-06-13 1986-11-11 Lignes Telegraphiques Et Telephoniques L.T.T. A device for distributing light energy including at least one inlet fiber with a chamfered outlet end and a diffraction grating, and application thereof to optical switching
US4739501A (en) * 1984-09-01 1988-04-19 Alcatel N.V. Optical multiplexer/demultiplexer

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