ES2513941T3 - Fibra óptica multimodo de ancho de banda alto que tiene pérdidas por curvatura reducidas - Google Patents

Fibra óptica multimodo de ancho de banda alto que tiene pérdidas por curvatura reducidas Download PDF

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Publication number
ES2513941T3
ES2513941T3 ES10193147.5T ES10193147T ES2513941T3 ES 2513941 T3 ES2513941 T3 ES 2513941T3 ES 10193147 T ES10193147 T ES 10193147T ES 2513941 T3 ES2513941 T3 ES 2513941T3
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radius
refractive index
fiber optic
high bandwidth
respect
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Denis Molin
Marianne Bigot-Astruc
Pierre Sillard
Koen De Jongh
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Draka Comteq BV
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Draka Comteq BV
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02Optical fibres with cladding with or without a coating
    • G02B6/028Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
    • G02B6/0288Multimode fibre, e.g. graded index core for compensating modal dispersion
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02Optical fibres with cladding with or without a coating
    • G02B6/036Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616Optical 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
    • G02B6/03638Optical 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
    • G02B6/0365Optical 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 - - +
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02Optical fibres with cladding with or without a coating
    • G02B6/036Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616Optical 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
    • G02B6/03661Optical 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
    • G02B6/03666Optical 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 - + - +

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

Abstract

Fibra óptica multimodo, que comprende desde el centro hasta la periferia: - un núcleo central que tiene un radio r1, un perfil de índice en alfa, y en dicho radio r1, una diferencia de índice de refracción negativa nend con respecto a un revestimiento exterior mayor de aproximadamente -1x10-3; en la que dicho perfil de índice de alfa es un perfil de índice gradual tiene un índice de refracción mínimo para el radio r1; y - un revestimiento interior que tiene un radio r2, una anchura w2, y una diferencia de índice de refracción n2 con respecto a dicho revestimiento exterior en el que el valor absoluto de n2 está comprendido entre 0,2x10-3 y 2x10-3; y - una zanja deprimida que tiene un radio rout, una anchura w3, una diferencia de índice de refracción n3 con respecto a dicho exterior revestimiento de entre aproximadamente -15.10-3 y -3.10-3, y (iv) un volumen v3; y - el revestimiento exterior.

Description

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E10193147
07-10-2014
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1 4 -0.08 -6 -0.416 293 0.06 12113 0.432 0.152
3
1 4 0.09 -7 0.486 342 0.06 12439 0.333 0.110
4
1 4 0.26 -8 -0.556 391 0.06 12611 0.256 0.079
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1 4 0.42 -9 -0.627 441 0.06 12575 0.197 0.057
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1 4 0.57 -10 -0.697 490 0.06 12537 0.152 0.041
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1 4 0.71 -11 -0.767 540 0.06 12538 0.117 0.030
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1 4 0.85 -12 -0.838 590 0.06 12782 0.090 0.021
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1 4 0.97 -13 -0.909 640 0.06 12848 0.069 0.015
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1 4 1.08 -14 -0.980 689 0.06 12946 0.053 0.011
11
1 4 1.19 -15 -1.051 739 0.06 13203 0.041 0.008
[0097] La primera columna de la tabla 1 proporciona el número de referencia para cada realización de una fibra óptica. La segunda y tercera columnas, respectivamente, muestran la anchura W2 del revestimiento interior y la anchura W3 de la zanja deprimida. La cuarta y quinta columnas, muestran respectivamente la diferencia de índice de refracción ∆n2 del revestimiento interior y la diferencia de índice de refracción ∆n3 de la zanja deprimida. La sexta columna muestra la diferencia del índice de refracción de la zanja deprimida ∆3% expresada en porcentaje. La séptima columna muestra el volumen V3 de la zanja deprimida. Las últimas cuatro columnas, muestran el retardo de DMD exterior, el ancho de banda OFL a 850 nanómetros, las pérdidas por curvatura para dos vueltas alrededor de un radio de curvatura de 5 milímetros a 850 nanómetros, y las pérdidas por curvatura para dos vueltas alrededor de un radio de curvatura de 7,5 milímetros a 850 nanómetros. [0098] Las fibras ópticas ejemplares 1 y 2 tienen diferencias de índice de refracción ∆n2 negativos del revestimiento. Las fibras ópticas ejemplares 3 a 11 tienen diferencias de índice de refracción ∆n2 de revestimiento interno positivas. Los ejemplos 1 a 11 muestran que el aumento de volumen V3 de la zanja deprimida reduce las pérdidas por curvatura a 0,041 dB para un radio de curvatura de 5 mm, y a 0,008 dB para un radio de curvatura de 7,5 milímetros. Además, el retardo DMD exterior y el ancho de banda OFL no se ven afectados negativamente. Por lo tanto, el ajuste de la diferencia de índice de refracción ∆n2 del revestimiento interno y la diferencia de índice de refracción de la zanja deprimida ∆n3, disminuye las pérdidas por curvatura preservando al mismo tiempo un retardo de DMD exterior de aproximadamente 0,06 ps/m y un ancho de banda OFL mayor de 13.200 MHz • km. [0099] De acuerdo con una realización, la fibra óptica de la presente invención cumple con la recomendación UIT-T
G.651.1. Así, tiene un diámetro de núcleo central de 50 micrómetros (es decir, un radio r1 del núcleo central de 25 micrómetros), y/o una apertura numérica de 0,2 ± 0,015. [0100] En otro aspecto, la presente invención abarca un sistema óptico multimodo que incluye al menos una porción
de una fibra óptica como se describe aquí de acuerdo con la presente invención. En particular, el sistema óptico puede presentar una tasa de transmisión de datos de, al menos, 10 Gb/s sobre, al menos, 100 metros (por ejemplo, 300 metros). [0101] Los presentes fibras ópticas pueden ser fabricadas mediante estirado a partir de preformas finales. [0102] Una preforma final puede ser fabricada, proporcionando una preforma primaria con una capa de sobre revestimiento exterior (es decir, un proceso sobre revestimiento). La capa de sobre revestimiento exterior consiste típicamente de vidrio de sílice dopado o sin dopar, natural o sintético. Varios procedimientos están disponibles para proporcionar la capa de sobre revestimiento exterior. [0103] En una primera realización de un procedimiento, la capa de sobre revestimiento exterior puede ser proporcionada mediante deposición y vitrificación de partículas de sílice naturales o sintéticas sobre la periferia exterior de la preforma primaria bajo la influencia de calor. Tal proceso se conoce, por ejemplo, de las patentes EE.UU, números 5.522.007, 5.194.714, 6.269.663, y 6.202.447. [0104] En otra forma de realización de un procedimiento, una preforma primaria puede ser sobrerevestida usando un
tubo de camisa de sílice, que ser dopada o no. Este tubo de camisa puede ser entonces colapsado en la preforma primaria. [0105] En aún otra realización de un procedimiento, se puede aplicar una capa de sobrerevestimiento a través de un método de deposición en fase de vapor exterior (OVD). Aquí, una capa de negro de humo se deposita primero sobre la periferia exterior de una preforma primaria, y luego la capa de negro de humo se vitrifica para formar vidrio. [0106] Las preformas primarias pueden ser fabricadas mediante técnicas de deposición en fase de vapor exterior,
tales como deposición en fase de vapor exterior (OVD) y deposición en fase de vapor axial (VAD). Alternativamente, las preformas primarias pueden ser fabricadas a través de técnicas de deposición en el interior en las que se
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Claims (1)

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ES10193147.5T 2009-12-03 2010-11-30 Fibra óptica multimodo de ancho de banda alto que tiene pérdidas por curvatura reducidas Active ES2513941T3 (es)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR0958639A FR2953606B1 (fr) 2009-12-03 2009-12-03 Fibre optique multimode a large bande passante et a faibles pertes par courbure
FR0958639 2009-12-03
US26675409P 2009-12-04 2009-12-04
US266754P 2009-12-04

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ES2513941T3 true ES2513941T3 (es) 2014-10-27

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US (1) US8428410B2 (es)
EP (1) EP2339384B1 (es)
JP (1) JP5663281B2 (es)
CN (1) CN102087379B (es)
DK (1) DK2339384T3 (es)
ES (1) ES2513941T3 (es)
FR (1) FR2953606B1 (es)

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US20110135263A1 (en) 2011-06-09
CN102087379A (zh) 2011-06-08
DK2339384T3 (da) 2014-10-13
FR2953606B1 (fr) 2012-04-27
JP5663281B2 (ja) 2015-02-04
CN102087379B (zh) 2014-07-30
US8428410B2 (en) 2013-04-23
EP2339384B1 (en) 2014-08-27
EP2339384A1 (en) 2011-06-29
JP2011118392A (ja) 2011-06-16

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