Structured double-sheath fiber

US9065245B2 · kind B2 · utility

Assignees

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE
• Friedrich-Schiller-Universitat Jena · DE

Inventors

• César Jáuregui Misas · Jena, DE
• Fabian Stutzki · Jena, DE
• Jens Limpert · Jena, DE
• Florian Jansen · Villingen-Schwenningen, DE
• Andreas Tuennermann · Jena, DE

Key dates

• Filing date: Nov 22, 2011
• Grant date: Jun 23, 2015
• Expiry date: Nov 22, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03622
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

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).