JPS55121403A - Photo multiplexing lens and branching and coupling device - Google Patents

Photo multiplexing lens and branching and coupling device

Info

Publication number
JPS55121403A
JPS55121403A JP2819979A JP2819979A JPS55121403A JP S55121403 A JPS55121403 A JP S55121403A JP 2819979 A JP2819979 A JP 2819979A JP 2819979 A JP2819979 A JP 2819979A JP S55121403 A JPS55121403 A JP S55121403A
Authority
JP
Japan
Prior art keywords
lens
entered
fiber
filter
lambda4
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
JP2819979A
Other languages
Japanese (ja)
Inventor
Shigeta Ishikawa
Kikuo Doi
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 JP2819979A priority Critical patent/JPS55121403A/en
Publication of JPS55121403A publication Critical patent/JPS55121403A/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
    • G02B6/29346—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
    • G02B6/2937—In line lens-filtering-lens devices, i.e. elements arranged along a line and mountable in a cylindrical package for compactness, e.g. 3- port device with GRIN lenses sandwiching a single filter operating at normal incidence in a tubular package
    • 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 Couplings Of Light Guides (AREA)

Abstract

PURPOSE:To obtain the photo branching and coupling device of small insertion losses by securing an interference filter to one end face of the cylindrical lens decreasing at the square of radius from the centerline toward the outside circumference and bonding the other one lens at said filter surface. CONSTITUTION:The exit beams lambda1-lambda4 from a fiber 11 are entered to the first lens 6. The light beam of the wavelength lambda1 is transmitted by the band-pass filter 9 in this lens and is entered to a fiber 14. Next, the remaining three wavelengths lambda2-lambda4 are reflected and are entered to the filter 7 of the next lens, where the beam of lambda2 is transmitted and is entered to a fiber 12. The remaining beams of lambda3, lambda4 are entered to the filter 9 in the next lens, through which the wavelength lambda3 is transmitted and this wavelength enters a fiber 15. The remaining beam of lambda4 is reflected thereby and transmits through a filter 16 in the next lens and enters a fiber 13. In this way, the insertion losses at the respective wavelengths become even and the photo branching and coupling device of low insertion losses as a whole may be obtained.
JP2819979A 1979-03-13 1979-03-13 Photo multiplexing lens and branching and coupling device Pending JPS55121403A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2819979A JPS55121403A (en) 1979-03-13 1979-03-13 Photo multiplexing lens and branching and coupling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2819979A JPS55121403A (en) 1979-03-13 1979-03-13 Photo multiplexing lens and branching and coupling device

Publications (1)

Publication Number Publication Date
JPS55121403A true JPS55121403A (en) 1980-09-18

Family

ID=12241994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2819979A Pending JPS55121403A (en) 1979-03-13 1979-03-13 Photo multiplexing lens and branching and coupling device

Country Status (1)

Country Link
JP (1) JPS55121403A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474424A (en) * 1981-03-20 1984-10-02 At&T Bell Laboratories Optical multi/demultiplexer using interference filters
US4789219A (en) * 1986-03-06 1988-12-06 The United States Of America As Represented By The United States Department Of Energy Gradient index retroreflector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474424A (en) * 1981-03-20 1984-10-02 At&T Bell Laboratories Optical multi/demultiplexer using interference filters
US4789219A (en) * 1986-03-06 1988-12-06 The United States Of America As Represented By The United States Department Of Energy Gradient index retroreflector

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