JPS56164305A - Optical fiber dispersively delayed equalizer and its production - Google Patents

Optical fiber dispersively delayed equalizer and its production

Info

Publication number
JPS56164305A
JPS56164305A JP6706180A JP6706180A JPS56164305A JP S56164305 A JPS56164305 A JP S56164305A JP 6706180 A JP6706180 A JP 6706180A JP 6706180 A JP6706180 A JP 6706180A JP S56164305 A JPS56164305 A JP S56164305A
Authority
JP
Japan
Prior art keywords
light
optical fibers
lambdai
grating
delayed equalizer
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
JP6706180A
Other languages
Japanese (ja)
Inventor
Nobuyuki Imoto
Masahiro Ikeda
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 JP6706180A priority Critical patent/JPS56164305A/en
Publication of JPS56164305A publication Critical patent/JPS56164305A/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
    • G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
    • G02B6/29317—Light guides of the optical fibre type
    • G02B6/29319—With a cascade of diffractive elements or of diffraction operations
    • 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
    • G02B6/29392—Controlling dispersion
    • G02B6/29394—Compensating wavelength dispersion

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

PURPOSE:To obtain the small delayed equalizer with a small loss by oscillating a drawing speed of optical fibers at the prescribed frequency at intervals of fixed time and by changing periodically the core diameter in the direction of light propa?gation. CONSTITUTION:N pieces of regions (grating)where the diameters of a core 1 and a clad 2 are changed periodically are provided at a position of Zi (i=1-N) in the direction of light propagation from an incident end of the optical fibers. Zi and the period Li of the grating are taken to become Zi=ls(lambdai-lambda1)c/2ne, Li=lambdai/2ne. Where S is an absolute value of the dispersion, lambda is wavelength of light, C is a light velocity, and ne is an equivalent reflactive index of the waveguide. In order to put this device into proctice, an ascillation with prescribed frequency and amplitude is applied at intervals of fixed time to optical fibers 27 drawn at a definite speed through a capster 23 and an ascillator 24 placed on the way. The exit light not having delay difference is applied to the incident light consisting of light of N pieces of wavelengths to obtain a delayed equalizer with less loss and smaller in size.
JP6706180A 1980-05-22 1980-05-22 Optical fiber dispersively delayed equalizer and its production Pending JPS56164305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6706180A JPS56164305A (en) 1980-05-22 1980-05-22 Optical fiber dispersively delayed equalizer and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6706180A JPS56164305A (en) 1980-05-22 1980-05-22 Optical fiber dispersively delayed equalizer and its production

Publications (1)

Publication Number Publication Date
JPS56164305A true JPS56164305A (en) 1981-12-17

Family

ID=13333945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6706180A Pending JPS56164305A (en) 1980-05-22 1980-05-22 Optical fiber dispersively delayed equalizer and its production

Country Status (1)

Country Link
JP (1) JPS56164305A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6138908A (en) * 1984-07-11 1986-02-25 エステイーシー・ピーエルシー Optical fiber transmission system
JPH01140124A (en) * 1987-11-27 1989-06-01 Hitachi Ltd Optical device
JPH03171015A (en) * 1989-11-13 1991-07-24 American Teleph & Telegr Co <Att> Wavelength selecting mode coupler and method of mode coupling of light energy
US5321777A (en) * 1989-07-31 1994-06-14 British Telecommunications Public Limited Company Fibre modulators
WO1999022199A3 (en) * 1997-10-24 2001-07-12 Pirelli Cavi E Sistemi Spa Fabricating optical waveguide gratings and/or characterising optical waveguides

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6138908A (en) * 1984-07-11 1986-02-25 エステイーシー・ピーエルシー Optical fiber transmission system
JPH057683B2 (en) * 1984-07-11 1993-01-29 Stc Plc
JPH01140124A (en) * 1987-11-27 1989-06-01 Hitachi Ltd Optical device
US5321777A (en) * 1989-07-31 1994-06-14 British Telecommunications Public Limited Company Fibre modulators
JPH03171015A (en) * 1989-11-13 1991-07-24 American Teleph & Telegr Co <Att> Wavelength selecting mode coupler and method of mode coupling of light energy
WO1999022199A3 (en) * 1997-10-24 2001-07-12 Pirelli Cavi E Sistemi Spa Fabricating optical waveguide gratings and/or characterising optical waveguides

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