JPS5595907A - Photo branching filter - Google Patents

Photo branching filter

Info

Publication number
JPS5595907A
JPS5595907A JP356779A JP356779A JPS5595907A JP S5595907 A JPS5595907 A JP S5595907A JP 356779 A JP356779 A JP 356779A JP 356779 A JP356779 A JP 356779A JP S5595907 A JPS5595907 A JP S5595907A
Authority
JP
Japan
Prior art keywords
light
light signal
optical
optical fibers
enters
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
JP356779A
Other languages
Japanese (ja)
Inventor
Koichi Aoyama
Junichiro Minowa
Ikutaro Kobayashi
Tetsuya Miki
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 JP356779A priority Critical patent/JPS5595907A/en
Publication of JPS5595907A publication Critical patent/JPS5595907A/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 Communication System (AREA)

Abstract

PURPOSE:To miniaturize the optical system by providing the function of combining and dispersing the light signal comprising multiplexing the plural light signals of different wavelengths to an optical means as well as to reduce the losses of the light signal by densely arraying the end parts of plural optical fibers in series within the common plane. CONSTITUTION:The filter is provided with an optical fiber F0 which transmits the light signal L0 comprising multiplexing plural N-light signals L1-LN of different wavelengths, N-optical fibers F1-FN which separately transmit the light signal, a light dispersing element D which angularly disperses the light signals L1...LN at angles when the light signal L0 enters and the common optical means which enters the light signal L0 emitted from the end face f0 of the optical fiber F0 to the light dispersing element D, lets the light signals L1...LN emit from the light dispersing element D and enters these respectively into the optical fibers F1...FN. The end parts of the optical fibers F0, F1...FN are densely arrayed in series within the common plane. Hence, the optical system may be miniaturized and the losses of the light signal are reduced through decreasing the angle theta' of the light signal L0 and L1...LN.
JP356779A 1979-01-16 1979-01-16 Photo branching filter Pending JPS5595907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP356779A JPS5595907A (en) 1979-01-16 1979-01-16 Photo branching filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP356779A JPS5595907A (en) 1979-01-16 1979-01-16 Photo branching filter

Publications (1)

Publication Number Publication Date
JPS5595907A true JPS5595907A (en) 1980-07-21

Family

ID=11561003

Family Applications (1)

Application Number Title Priority Date Filing Date
JP356779A Pending JPS5595907A (en) 1979-01-16 1979-01-16 Photo branching filter

Country Status (1)

Country Link
JP (1) JPS5595907A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073300A2 (en) * 1981-08-27 1983-03-09 Philips Kommunikations Industrie AG Device for the separate decoupling of optical signals having different wavelengths
US4387955A (en) * 1981-02-03 1983-06-14 The United States Of America As Represented By The Secretary Of The Air Force Holographic reflective grating multiplexer/demultiplexer
FR2566139A1 (en) * 1984-06-13 1985-12-20 Lignes Telegraph Telephon DEVICE FOR DISTRIBUTING LIGHT ENERGY AND ITS USE IN OPTICAL SWITCHING

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53106061A (en) * 1977-02-26 1978-09-14 Nippon Telegr & Teleph Corp <Ntt> Optical branching filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53106061A (en) * 1977-02-26 1978-09-14 Nippon Telegr & Teleph Corp <Ntt> Optical branching filter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387955A (en) * 1981-02-03 1983-06-14 The United States Of America As Represented By The Secretary Of The Air Force Holographic reflective grating multiplexer/demultiplexer
EP0073300A2 (en) * 1981-08-27 1983-03-09 Philips Kommunikations Industrie AG Device for the separate decoupling of optical signals having different wavelengths
FR2566139A1 (en) * 1984-06-13 1985-12-20 Lignes Telegraph Telephon DEVICE FOR DISTRIBUTING LIGHT ENERGY AND ITS USE IN OPTICAL SWITCHING

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