STRUCTURED DOUBLE-SHEATH FIBER

STRUCTURED DOUBLE-SHEATH FIBER

The invention relates to a double-sheath fiber having a core region (1) and a sheath region, the sheath region having an inner region (2) and an outer region (3), which comprises a refractive index that is lower with respect to that of the inner region (2) and the core region (1), wherein the outer...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: JANSEN, Florian, STUTZKI, Fabian, TÜNNERMANN, Andreas, JAUREGUI MISAS, César, LIMPERT, Jens
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Beschreibung
Zusammenfassung:The invention relates to a double-sheath fiber having a core region (1) and a sheath region, the sheath region having an inner region (2) and an outer region (3), which comprises a refractive index that is lower with respect to that of the inner region (2) and the core region (1), wherein the outer region (3) surrounds the inner region (2). The invention proposes an internal structure (4) of the inner region (2) which effects a spatial overlap of modes of higher order with the core region (1), which is lower than the spatial overlap of a fundamental mode with the core region (1).