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DK2541292T3 - Optisk multimode fiber - Google Patents

Optisk multimode fiber Download PDF

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Publication number
DK2541292T3
DK2541292T3 DK11305851T DK11305851T DK2541292T3 DK 2541292 T3 DK2541292 T3 DK 2541292T3 DK 11305851 T DK11305851 T DK 11305851T DK 11305851 T DK11305851 T DK 11305851T DK 2541292 T3 DK2541292 T3 DK 2541292T3
Authority
DK
Denmark
Prior art keywords
index
core
radius
fibre
trench
Prior art date
Application number
DK11305851T
Other languages
English (en)
Inventor
Marianne Bigot-Astruc
Denis Molin
Pierre Sillard
Original Assignee
Draka Comteq Bv
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 Draka Comteq Bv filed Critical Draka Comteq Bv
Application granted granted Critical
Publication of DK2541292T3 publication Critical patent/DK2541292T3/da

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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
    • G02B6/028—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
    • 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
    • G02B6/03605—Highest refractive index not on central axis
    • 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
    • G02B6/03661—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 4 layers only
    • G02B6/03683—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 4 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
    • G02B6/036—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
    • G02B6/03638—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 3 layers only
    • G02B6/0365—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 3 layers only arranged - - +

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Claims (14)

1. Optisk multimode fiber, omfattende: et kerneområde, en indre forsænket kappe, en rende, en ydre forsænket kappe og en ekstern kappe: - kerneområdet har en første radius (R1) og en alfa-profil med et optisk maksimumskerneindeks og en forskel i indeks (Δη-ι) mellem det optiske maksimumskerneindeks og den eksterne kappe, hvor R1 er mellem 23 pm og 27 pm; - den indre forsænkede kappe strækker sig radialt fra den første radius (R1) til en anden radius R2, hvorved den indre forsænkede kappe er forsænket i sammenligning med den eksterne kappe - forskellen i afstand mellem den anden radius R2 og den første radius (R1) er mellem 0,6 pm og 3,5 pm; hvor forskellen i indeks mellem den indre forsænkede kappe og den ydre forsænkede kappe svarer til Anener - Δη2, hvor Aninner er forskellen i indeks mellem den indre forsænkede kappe og den eksterne kappe, og Δη2 er forskellen i indeks mellem den ydre forsænkede kappe og den eksterne kappe; - renden strækker sig fra den anden radius R2 til en tredje radius R3 og har en bredde w2 og en dybde AntrenCh, der svarer til forskellen i indeks mellem renden og den ydre forsænkede kappe og har et volumen Vtrench; - den ydre forsænkede kappe strækker sig radialt fra den tredje radius R3 til en fjerde radius (R4), hvorved den ydre forsænkede kappe er forsænket sammenlignet med den eksterne kappe; - en ekstern kappe strækker sig radialt fra den fjerde radius (R4) - den fjerde radius (R4) er mellem 30 pm og 47 pm; hvor volumenet af renden Vtrench er mellem 1650x10'3 pm2 og 4500x10'3 pm2 og er givet ved:
2. Fiber ifølge krav 1, hvor forskellen i indeks (Δηι) mellem det optiske maksimumskerneindeks og den eksterne kappe er mellem -1,0x10'3 og 0,8x10'3.
3. Fiber ifølge et hvilket som helst af krav 1 eller krav 2, hvor forskellen i indeks (Δη2) mellem den ydre forsænkede kappe og den eksterne kappe er mellem -18x10'3 og-12x10'3.
4. Fiber ifølge et hvilket som helst af krav 1 til krav 3, hvor forskellen i afstand mellem den tredje radius (R3) og den anden radius (R2) er mellem 2,4 pm og 10 pm.
5. Fiber ifølge et hvilket som helst af krav 1 til krav 4, hvor forskellen i indeks (Antrench) mellem renden og den ydre forsænkede kappe er mellem -6x10'3 og -2x10'3.
6. Fiber ifølge et hvilket som helst af krav 1 til krav 5, hvor reduktionen af båndbredde ved overfilled launch mellem båndbredden ved overfilled launch målt på 500 m og båndbredden ved overfilled launch målt på 8 km (ΔΒ) ved en bølgelængde på 850 nm er mindre end 10%.
7. Fiber ifølge et hvilket som helst af krav 1 til krav 6, hvor reduktionen af båndbredde ved overfilled launch mellem båndbredden ved overfilled launch målt på 500 m og båndbredden ved overfilled launch målt på 8 km (ΔΒ) ved en bølgelængde på 1300 nm er mindre end 30%.
8. Fiber ifølge et hvilket som helst af krav 1 til krav 7, hvor kernestørrelsen ved 850 nm målt ved 2 m med nærfeltteknikken er lig med den første radius plus eller minus 2 pm.
9. Fiber ifølge et hvilket som helst af krav 1 til krav 8, hvor forskellen i indeks mellem renden og den eksterne kappe er mellem -24x10'3 og -14x10'3.
10. Fiber ifølge et hvilket som helst af krav 1 til krav 9, hvor forskellen i indeks mellem den indre forsænkede kappe og den ydre forsænkede kappe er mellem -2x10'3 og 2x10'3.
11. Fiber ifølge et hvilket som helst af krav 1 til krav 10, hvor alfa er mellem 1,9 og 2,1.
12. Fiber ifølge et hvilket som helst af krav 1 til krav 11, hvor båndbredden ved overfilled launch ved en bølgelængde på 850 nm er større end 500 MFIz.km og fortrinsvis større end 1000 MHz.km.
13. Fiber ifølge et hvilket som helst af krav 1 til krav 12, hvor båndbredden ved overfilled launch ved en bølgelængde på 1300 nm er større end 500 MFIz.km og fortrinsvis større end 1000 MHz.km.
14. Fremgangsmåde til fremstilling af en optisk fiber ifølge et hvilket som helst af krav 1 til 13.
DK11305851T 2011-07-01 2011-07-01 Optisk multimode fiber DK2541292T3 (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11305851.5A EP2541292B1 (en) 2011-07-01 2011-07-01 Multimode optical fibre

Publications (1)

Publication Number Publication Date
DK2541292T3 true DK2541292T3 (da) 2014-12-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
DK11305851T DK2541292T3 (da) 2011-07-01 2011-07-01 Optisk multimode fiber

Country Status (5)

Country Link
US (1) US8879878B2 (da)
EP (1) EP2541292B1 (da)
JP (1) JP6031276B2 (da)
CN (1) CN102854563B (da)
DK (1) DK2541292T3 (da)

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