JPS5729006A - Optical branching filter - Google Patents

Optical branching filter

Info

Publication number
JPS5729006A
JPS5729006A JP10357580A JP10357580A JPS5729006A JP S5729006 A JPS5729006 A JP S5729006A JP 10357580 A JP10357580 A JP 10357580A JP 10357580 A JP10357580 A JP 10357580A JP S5729006 A JPS5729006 A JP S5729006A
Authority
JP
Japan
Prior art keywords
refractive index
optical branching
layer
diffraction grating
plane diffraction
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
JP10357580A
Other languages
Japanese (ja)
Inventor
Takaichi Watanabe
Kiyoshi Nosu
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 JP10357580A priority Critical patent/JPS5729006A/en
Publication of JPS5729006A publication Critical patent/JPS5729006A/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
    • G02B6/29308—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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

PURPOSE:To obtain an optical branching filter which performs wavelength dispersion with a plane diffraction grating or the like by providing a refractive index distribution to a high refractive index layer of a slab waveguide to create lens effect thereby converging light. CONSTITUTION:The rays propagating in a slab wavelength 4 are reflected in a perpendicular direction by the boundary surface of a high refractive index layer 2 and a low refractive index layer 3, and advances zigzag in the layer 2. On the other hand, in a horizontal direction, they are roughly parallel rays where they advance up to a plane diffraction grating 7 according to the refractive index distribution of the layer 2. Receiving wavelength dispersion by the grating 7, they are reflected and converged at the angles varying for each wavelength, and form focuses on the end faces of output optical fibers 61-6n. As a result, the rays of respectively different wavelengths of the fibers 61-6n couple and operate as optical branching filters. With such constitution, the optical branching filter is obtained with the plane diffraction grating or the like.
JP10357580A 1980-07-30 1980-07-30 Optical branching filter Pending JPS5729006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10357580A JPS5729006A (en) 1980-07-30 1980-07-30 Optical branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10357580A JPS5729006A (en) 1980-07-30 1980-07-30 Optical branching filter

Publications (1)

Publication Number Publication Date
JPS5729006A true JPS5729006A (en) 1982-02-16

Family

ID=14357581

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10357580A Pending JPS5729006A (en) 1980-07-30 1980-07-30 Optical branching filter

Country Status (1)

Country Link
JP (1) JPS5729006A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936222A (en) * 1982-08-25 1984-02-28 Nec Corp Optical demultiplexer
JPS61203414A (en) * 1985-03-05 1986-09-09 Matsushita Electric Ind Co Ltd Optical demultiplexer
JPH01178903A (en) * 1987-12-29 1989-07-17 Hoya Corp Optical demultiplexing/branching device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936222A (en) * 1982-08-25 1984-02-28 Nec Corp Optical demultiplexer
JPS61203414A (en) * 1985-03-05 1986-09-09 Matsushita Electric Ind Co Ltd Optical demultiplexer
JPH01178903A (en) * 1987-12-29 1989-07-17 Hoya Corp Optical demultiplexing/branching device

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