FR2328975A1 - Light guide for optical transmission system - has outer layer, intermediate layer and core, and transmits specific wave types - Google Patents

Light guide for optical transmission system - has outer layer, intermediate layer and core, and transmits specific wave types

Info

Publication number
FR2328975A1
FR2328975A1 FR7631522A FR7631522A FR2328975A1 FR 2328975 A1 FR2328975 A1 FR 2328975A1 FR 7631522 A FR7631522 A FR 7631522A FR 7631522 A FR7631522 A FR 7631522A FR 2328975 A1 FR2328975 A1 FR 2328975A1
Authority
FR
France
Prior art keywords
core
outer layer
light guide
transmission system
optical transmission
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.)
Granted
Application number
FR7631522A
Other languages
French (fr)
Other versions
FR2328975B1 (en
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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
Priority claimed from JP50125318A external-priority patent/JPS5250246A/en
Priority claimed from JP50134046A external-priority patent/JPS5258547A/en
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of FR2328975A1 publication Critical patent/FR2328975A1/en
Application granted granted Critical
Publication of FR2328975B1 publication Critical patent/FR2328975B1/fr
Granted 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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
    • G02B6/03622—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only
    • G02B6/03627—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only arranged - +
    • 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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
    • G02B6/0288—Multimode fibre, e.g. graded index core for compensating modal dispersion

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Glass Compositions (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Optical Communication System (AREA)

Abstract

The outer layer (2) and the intermediate layer (3) have dielectrics with uniform refractive indices. The refractive index of the intermediate layer (3) is smaller than that of the outer layer (2). The refractive index of the core (1) changes continuously in the radial direction of the core (1). Thus, the refractive index in the centre of the core (1) may be higher than the refractive indices of the outer and intermediate layers (2, 3). The refractive index on the edge of the core (1) is equal to that of the outer layer (2).
FR7631522A 1975-10-20 1976-10-20 Light guide for optical transmission system - has outer layer, intermediate layer and core, and transmits specific wave types Granted FR2328975A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP50125318A JPS5250246A (en) 1975-10-20 1975-10-20 Light transmitting line
JP50134046A JPS5258547A (en) 1975-11-10 1975-11-10 Light transmission fiber

Publications (2)

Publication Number Publication Date
FR2328975A1 true FR2328975A1 (en) 1977-05-20
FR2328975B1 FR2328975B1 (en) 1979-06-22

Family

ID=26461782

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7631522A Granted FR2328975A1 (en) 1975-10-20 1976-10-20 Light guide for optical transmission system - has outer layer, intermediate layer and core, and transmits specific wave types

Country Status (2)

Country Link
DE (1) DE2647419C2 (en)
FR (1) FR2328975A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026937A1 (en) * 1979-10-08 1981-04-15 Nippon Telegraph And Telephone Corporation Single mode optical fibers
WO1986006844A1 (en) * 1985-05-15 1986-11-20 Precitronic Gesellschaft Für Feinmechanik Und Elec Integration receiving device for laser radiation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229070A (en) * 1978-07-31 1980-10-21 Corning Glass Works High bandwidth optical waveguide having B2 O3 free core and method of fabrication
US4230396A (en) * 1978-07-31 1980-10-28 Corning Glass Works High bandwidth optical waveguides and method of fabrication
DE3042795C2 (en) * 1980-11-13 1988-03-03 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Multi-layer optical fiber
DE102011109838A1 (en) 2011-05-27 2012-11-29 J-Plasma Gmbh optical fiber

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785718A (en) * 1972-09-11 1974-01-15 Bell Telephone Labor Inc Low dispersion optical fiber

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026937A1 (en) * 1979-10-08 1981-04-15 Nippon Telegraph And Telephone Corporation Single mode optical fibers
WO1986006844A1 (en) * 1985-05-15 1986-11-20 Precitronic Gesellschaft Für Feinmechanik Und Elec Integration receiving device for laser radiation

Also Published As

Publication number Publication date
DE2647419C2 (en) 1981-09-17
FR2328975B1 (en) 1979-06-22
DE2647419A1 (en) 1977-04-21

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