JPS56126806A - Diffraction grating type light branching filter - Google Patents

Diffraction grating type light branching filter

Info

Publication number
JPS56126806A
JPS56126806A JP3144180A JP3144180A JPS56126806A JP S56126806 A JPS56126806 A JP S56126806A JP 3144180 A JP3144180 A JP 3144180A JP 3144180 A JP3144180 A JP 3144180A JP S56126806 A JPS56126806 A JP S56126806A
Authority
JP
Japan
Prior art keywords
light
lens
diffraction grating
branching filter
output
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
JP3144180A
Other languages
Japanese (ja)
Inventor
Shigetoki Sugimoto
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 JP3144180A priority Critical patent/JPS56126806A/en
Publication of JPS56126806A publication Critical patent/JPS56126806A/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
    • G02B6/29307—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 components assembled in or forming a solid transparent unitary block, e.g. for facilitating component alignment
    • 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 easily increase the multiplicity in the wavelength split transmission, by forming at least a part of the light input/output circuits as a light waveguide line on the substrate. CONSTITUTION:The example of execution in the figure is an example showing the constitution of a light branching filter for receiving, of multiplicity 2. A light beam which is projected from the core C3 of the optical fiber F3 and has become a parallel luminous flux by the lens L1 is reflected by the diffraction grating G1, becomes a focusing light beam by the output lens L2, is coupled with the light waveguide lines W1, W2 which have been formed on the substrate S1, and are coupled with the cores C1, C2 of the output optical fibers F1, F2. In this case, the space of said waveguides in the fiber side is wider than that in the lens side, and it is possible to reduce remarkably the degree which makes the transmission band width DELTAlambda and the center wavelength space lambdas depend on the outside diameter of the optical fiber, and the diameter of the core.
JP3144180A 1980-03-11 1980-03-11 Diffraction grating type light branching filter Pending JPS56126806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3144180A JPS56126806A (en) 1980-03-11 1980-03-11 Diffraction grating type light branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3144180A JPS56126806A (en) 1980-03-11 1980-03-11 Diffraction grating type light branching filter

Publications (1)

Publication Number Publication Date
JPS56126806A true JPS56126806A (en) 1981-10-05

Family

ID=12331322

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3144180A Pending JPS56126806A (en) 1980-03-11 1980-03-11 Diffraction grating type light branching filter

Country Status (1)

Country Link
JP (1) JPS56126806A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174803A (en) * 1983-03-16 1984-10-03 カ−ル・ツアイス−スチフツング Wavelength multiplexer or demultiplexer
DE3414724A1 (en) * 1983-04-25 1984-10-25 American Telephone And Telegraph Co., New York, N.Y. OPTICAL MULTIPLEXER / DEMULTIPLEXER
JPS61109405U (en) * 1984-12-21 1986-07-11
JP2004258492A (en) * 2003-02-27 2004-09-16 Hitachi Cable Ltd Wavelength-multiplexing demultiplexer
EP0992842B1 (en) * 1998-10-05 2007-08-29 Avanex Corporation Device for regenerating a wavelength division multiplexed signal comprising a saturable absorber

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417044A (en) * 1977-07-07 1979-02-08 Nippon Selfoc Co Ltd Light wave multiple separation circuit for light beams
JPS5472068A (en) * 1977-11-18 1979-06-09 Mitsubishi Electric Corp Optical processor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417044A (en) * 1977-07-07 1979-02-08 Nippon Selfoc Co Ltd Light wave multiple separation circuit for light beams
JPS5472068A (en) * 1977-11-18 1979-06-09 Mitsubishi Electric Corp Optical processor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174803A (en) * 1983-03-16 1984-10-03 カ−ル・ツアイス−スチフツング Wavelength multiplexer or demultiplexer
DE3414724A1 (en) * 1983-04-25 1984-10-25 American Telephone And Telegraph Co., New York, N.Y. OPTICAL MULTIPLEXER / DEMULTIPLEXER
FR2544883A1 (en) * 1983-04-25 1984-10-26 American Telephone & Telegraph OPTICAL MULTIPLEXER / DEMULTIPLEXER
JPS59210413A (en) * 1983-04-25 1984-11-29 アメリカン・テレフォン・アンド・テレグラフ・カムパニー Device for optical multiplex communication
JPS61109405U (en) * 1984-12-21 1986-07-11
EP0992842B1 (en) * 1998-10-05 2007-08-29 Avanex Corporation Device for regenerating a wavelength division multiplexed signal comprising a saturable absorber
JP2004258492A (en) * 2003-02-27 2004-09-16 Hitachi Cable Ltd Wavelength-multiplexing demultiplexer

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