JPS54156555A - Photo circuit element - Google Patents

Photo circuit element

Info

Publication number
JPS54156555A
JPS54156555A JP6531478A JP6531478A JPS54156555A JP S54156555 A JPS54156555 A JP S54156555A JP 6531478 A JP6531478 A JP 6531478A JP 6531478 A JP6531478 A JP 6531478A JP S54156555 A JPS54156555 A JP S54156555A
Authority
JP
Japan
Prior art keywords
propagation constants
beta1
beta2
optical guides
optical
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
JP6531478A
Other languages
Japanese (ja)
Inventor
Masahiro Nunoshita
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP6531478A priority Critical patent/JPS54156555A/en
Publication of JPS54156555A publication Critical patent/JPS54156555A/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
    • G02B6/29331—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

Landscapes

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

Abstract

PURPOSE:To perform filtering and branching of light of good diffractive index efficiency with a simple constitution by such things as providing specified electrodes in the optical guides of asymmetricaly propagation constants which are coupled, changing the propagation constants according to applied voltage, etc. CONSTITUTION:Optical guides 1, 2 of asymmetrical propagation constants beta1, beta2 provided with the electrodes 19, 19 formed of layers of refractive indices slightly higher than those of ferrodielectric crystal LiNbO3, LiTaO3, etc. are installed on a substrate whose surfaces are thermally diffused with metal element such as Ti or other. When contants beta1, beta2 of the optical guides 1, 2 change and the central light wavelength of the filter band region and light wavelength region corresponding to phase matching by the constants beta1, beta2 are adjusted without decreasing diffractive index effect. Hence, the circuit element capable of performing branching and filtering of light at good diffractive index effect with the simple constitution is obtained without using any optical quides of highly accurate asymmetrical propagation constants. The similar results may also be obtained even by forming one of the optical guides in taper form.
JP6531478A 1978-05-30 1978-05-30 Photo circuit element Pending JPS54156555A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6531478A JPS54156555A (en) 1978-05-30 1978-05-30 Photo circuit element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6531478A JPS54156555A (en) 1978-05-30 1978-05-30 Photo circuit element

Publications (1)

Publication Number Publication Date
JPS54156555A true JPS54156555A (en) 1979-12-10

Family

ID=13283313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6531478A Pending JPS54156555A (en) 1978-05-30 1978-05-30 Photo circuit element

Country Status (1)

Country Link
JP (1) JPS54156555A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390236A (en) * 1981-03-19 1983-06-28 Bell Telephone Laboratories, Incorporated Tunable polarization independent wavelength filter
JPS6014205A (en) * 1983-06-25 1985-01-24 ア−・エヌ・テ−・ナツハリヒテンテヒニ−ク・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Balanced type optical guide connector
JPS6470703A (en) * 1987-09-11 1989-03-16 Hitachi Ltd Waveguide type optical multiplexer and demultiplexer
EP0576685A1 (en) * 1992-01-21 1994-01-05 Ibiden Co., Ltd. Waveguide type light directional coupler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390236A (en) * 1981-03-19 1983-06-28 Bell Telephone Laboratories, Incorporated Tunable polarization independent wavelength filter
JPS6014205A (en) * 1983-06-25 1985-01-24 ア−・エヌ・テ−・ナツハリヒテンテヒニ−ク・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Balanced type optical guide connector
JPS6470703A (en) * 1987-09-11 1989-03-16 Hitachi Ltd Waveguide type optical multiplexer and demultiplexer
EP0576685A1 (en) * 1992-01-21 1994-01-05 Ibiden Co., Ltd. Waveguide type light directional coupler
EP0576685B1 (en) * 1992-01-21 2000-06-14 Ibiden Co., Ltd. Waveguide type light directional coupler

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