JPS5772120A - Optical branching filter - Google Patents

Optical branching filter

Info

Publication number
JPS5772120A
JPS5772120A JP14821580A JP14821580A JPS5772120A JP S5772120 A JPS5772120 A JP S5772120A JP 14821580 A JP14821580 A JP 14821580A JP 14821580 A JP14821580 A JP 14821580A JP S5772120 A JPS5772120 A JP S5772120A
Authority
JP
Japan
Prior art keywords
beams
constitution
optical
optical branching
fibers
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
JP14821580A
Other languages
Japanese (ja)
Inventor
Ryozo Kishimoto
Masaki Koyama
Hiroshi Toba
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 JP14821580A priority Critical patent/JPS5772120A/en
Publication of JPS5772120A publication Critical patent/JPS5772120A/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
    • G02B6/2931—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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Filters (AREA)

Abstract

PURPOSE:To obtain an optical branching filter which is simple, is small in size and is of low losses by using a condenser lens system having plural focuses. CONSTITUTION:Multiple beams of light of different wavelengths from an optical filter F0 are made into parallel beams by a lens A1, and these are angularly branched to single wavelength beams L1, L2... by an angularly branching element D such as diffrction grating. These beams L1... are imaged and made incident to optical fibers F1... formed of incident faces at the focus positions by a condenser lens A3 having plural focuses. By such constitution wherein a long focal length lens of the focus is not used, the branched beams are made incident to the fibers F1... with good efficiency with single mode fibers as well, and the optical branching filter of the simple and small size constitution and low losses is obtained.
JP14821580A 1980-10-24 1980-10-24 Optical branching filter Pending JPS5772120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14821580A JPS5772120A (en) 1980-10-24 1980-10-24 Optical branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14821580A JPS5772120A (en) 1980-10-24 1980-10-24 Optical branching filter

Publications (1)

Publication Number Publication Date
JPS5772120A true JPS5772120A (en) 1982-05-06

Family

ID=15447838

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14821580A Pending JPS5772120A (en) 1980-10-24 1980-10-24 Optical branching filter

Country Status (1)

Country Link
JP (1) JPS5772120A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551887A1 (en) * 1983-09-09 1985-03-15 Sopelem DEVICE FOR COUPLING OPTICAL FIBER CABLES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551887A1 (en) * 1983-09-09 1985-03-15 Sopelem DEVICE FOR COUPLING OPTICAL FIBER CABLES
EP0142392A2 (en) * 1983-09-09 1985-05-22 Societe D'optique, Precision Electronique Et Mecanique - Sopelem Coupling device for optical fibre cables

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