JPS5690641A - Optical communication system - Google Patents

Optical communication system

Info

Publication number
JPS5690641A
JPS5690641A JP16725879A JP16725879A JPS5690641A JP S5690641 A JPS5690641 A JP S5690641A JP 16725879 A JP16725879 A JP 16725879A JP 16725879 A JP16725879 A JP 16725879A JP S5690641 A JPS5690641 A JP S5690641A
Authority
JP
Japan
Prior art keywords
wavelength
curvature
semiconductor laser
lights
lambdam
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
JP16725879A
Other languages
Japanese (ja)
Inventor
Norito Suzuki
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.)
KYOTO GIKEN KK
Original Assignee
KYOTO GIKEN KK
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 KYOTO GIKEN KK filed Critical KYOTO GIKEN KK
Priority to JP16725879A priority Critical patent/JPS5690641A/en
Publication of JPS5690641A publication Critical patent/JPS5690641A/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 minimize signal distortion on an optical fiber transmission line and to enable multiplexing by wavelength discrimination, by fixing oscillation wavelengths of semiconductor lasers. CONSTITUTION:When semiconductor laser spot light sources of wavelength lambdao are placed in center O of curvature of spherical mirror 5 having radius R of curvature and at one random point D, stigmatic hollow lattice 5 having an uneven-interval groove of a vertical straight line connecting O and D is formed. Then, the wavelength of one semiconductor laser to be fixed is denoted as lambdam and lattice constant (d) and incident angle thetam are selected satisfying 2lambdam=2dsinthetam, so that secondary diffracted light of wavelength lambdam may return to the incident point. Therefore, when many semiconductor lasers are arranged near point H, primary diffracted lights of respective oscillation lights all focus on center O of curvature and all semiconductor laser oscillation lights and can be sent via the same optical fiber.
JP16725879A 1979-12-23 1979-12-23 Optical communication system Pending JPS5690641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16725879A JPS5690641A (en) 1979-12-23 1979-12-23 Optical communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16725879A JPS5690641A (en) 1979-12-23 1979-12-23 Optical communication system

Publications (1)

Publication Number Publication Date
JPS5690641A true JPS5690641A (en) 1981-07-22

Family

ID=15846392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16725879A Pending JPS5690641A (en) 1979-12-23 1979-12-23 Optical communication system

Country Status (1)

Country Link
JP (1) JPS5690641A (en)

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