Strahlungsgresistente multimodale optische Faser mit hoher Bandbreite

Details

Veröffentlichungs-Nr.

EP2518546

Aktenzeichen

EP12165137

Anmeldetag

23. April 2012

Veröffentlichung

20. Juni 2018

Erteilung

20. Juni 2018

Rechtsraum

EP

IPC

G02B6/036G02B6/028

Abstract

A multimode optical fiber includes a central core, an interior cladding layer and an outer cladding (e.g., an outer optical cladding). Typically, the optical fiber's central core is a depressed, central core having an alpha-index profile (i.e., a graded-index profile), an outer radius r<1>, and a maximum refractive index difference Δn<1>with respect to the outer cladding. The central core's alpha-index profile has a minimum refractive index at the central core's outer radius r<1>that corresponds to a refractive index difference Δn<end>with respect to the outer cladding. The interior cladding layer has a negative refractive index difference with respect to the outer cladding. The central core has a maximum germanium concentration of 0.1 weight percent or less, an average chlorine concentration of 0.1 weight percent or less, and, at said outer radius r<1>, a minimum fluorine concentration of 3 weight percent or more. Exemplary optical-fiber embodiments may include an inner cladding having an outer radius r<2>, a width w<2>, and a refractive index difference Δn<2>with respect to the outer cladding. Exemplary optical-fiber embodiments may include a buried trench having a width w<3>, an outer radius r<3>, and a refractive index difference Δn<3>with respect to the outer cladding. Furthermore, exemplary optical-fiber embodiments may include an intermediate cladding having an outer radius r<4>, a width w<4>, and a refractive index difference Δn<4>with respect to the outer cladding.

Anmelder

Firma

Draka Comteq B.V.

Land

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