JPS57211104A - Directional coupler type optical demultiplexer having periodic structure - Google Patents

Directional coupler type optical demultiplexer having periodic structure

Info

Publication number
JPS57211104A
JPS57211104A JP9621981A JP9621981A JPS57211104A JP S57211104 A JPS57211104 A JP S57211104A JP 9621981 A JP9621981 A JP 9621981A JP 9621981 A JP9621981 A JP 9621981A JP S57211104 A JPS57211104 A JP S57211104A
Authority
JP
Japan
Prior art keywords
optical
region
directional coupler
incidence
periodic
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
JP9621981A
Other languages
Japanese (ja)
Inventor
Yutaka Sasaki
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 JP9621981A priority Critical patent/JPS57211104A/en
Publication of JPS57211104A publication Critical patent/JPS57211104A/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
    • G02B6/29331—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 evanescent wave coupling
    • G02B6/29332—Wavelength selective couplers, i.e. based on evanescent coupling between light guides, e.g. fused fibre couplers with transverse coupling between fibres having different propagation constant wavelength dependency
    • G02B6/29334—Grating-assisted evanescent light guide couplers, i.e. comprising grating at or functionally associated with the coupling region between the light guides, e.g. with a grating positioned where light fields overlap in the coupler
    • 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 Integrated Circuits (AREA)

Abstract

PURPOSE:To obtain an optical demultiplexer having sharp dividing characteristics and cut-off characteristics, by combining the dividing characteristics due to providing of a periodic structure region and the dividing characteristics due to a directional coupler in cascade. CONSTITUTION:An incidence region 11, a periodic region 12, and an exit region 13 are provided on a bulk medium 14 having a uniform refractive index, and two optical waveguides 15 and 16 are formed in the bulk medium 14. Optical waveguides 15 and 16 are close to and in parallel with each other across the incidence region 11 and the periodic region 12 to form an optical directional coupler 17, and the refractive index is changed periodically for the direction of light incidence in the periodic region 12 specially. In an optical demultipler having this constitution, when optical waves having plural center wavelengths are incident from an incidence port 1 of the optical waveguide 15, only the optical wave having a specific center wavelength is emitted from an exit port 2 of the optical waveguide 16.
JP9621981A 1981-06-22 1981-06-22 Directional coupler type optical demultiplexer having periodic structure Pending JPS57211104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9621981A JPS57211104A (en) 1981-06-22 1981-06-22 Directional coupler type optical demultiplexer having periodic structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9621981A JPS57211104A (en) 1981-06-22 1981-06-22 Directional coupler type optical demultiplexer having periodic structure

Publications (1)

Publication Number Publication Date
JPS57211104A true JPS57211104A (en) 1982-12-24

Family

ID=14159119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9621981A Pending JPS57211104A (en) 1981-06-22 1981-06-22 Directional coupler type optical demultiplexer having periodic structure

Country Status (1)

Country Link
JP (1) JPS57211104A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571024A (en) * 1983-10-25 1986-02-18 The United States Of America As Represented By The Secretary Of The Air Force Wavelength selective demultiplexer tuner
JPS62121407A (en) * 1985-11-21 1987-06-02 Hitachi Ltd Optical filter and wavelength multiplex transmission device using the optical filter
JP2007523387A (en) * 2004-03-29 2007-08-16 インテル・コーポレーション Method and apparatus for providing an optical beam output coupler

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55161201A (en) * 1979-06-01 1980-12-15 Nippon Telegr & Teleph Corp <Ntt> Light delay equalizer
JPS55163505A (en) * 1979-06-05 1980-12-19 Nippon Telegr & Teleph Corp <Ntt> Light wavelength selective coupling device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55161201A (en) * 1979-06-01 1980-12-15 Nippon Telegr & Teleph Corp <Ntt> Light delay equalizer
JPS55163505A (en) * 1979-06-05 1980-12-19 Nippon Telegr & Teleph Corp <Ntt> Light wavelength selective coupling device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571024A (en) * 1983-10-25 1986-02-18 The United States Of America As Represented By The Secretary Of The Air Force Wavelength selective demultiplexer tuner
JPS62121407A (en) * 1985-11-21 1987-06-02 Hitachi Ltd Optical filter and wavelength multiplex transmission device using the optical filter
JP2007523387A (en) * 2004-03-29 2007-08-16 インテル・コーポレーション Method and apparatus for providing an optical beam output coupler

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