Optical fiber having cladding scattering centers

US7916991B2 · kind B2 · utility

Assignee

• TRUMPF Laser GmbH + Co. KG · DE

Inventors

• Malte Kumkar · Weimar, DE
• Rudolf Huber · Spaichingen, DE

Key dates

• Filing date: Sep 28, 2006
• Grant date: Mar 29, 2011
• Expiry date: Nov 10, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/14
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In an optical fiber (1) for the transmission of high-power laser radiation, with a fiber core (2), with an inner fiber cladding (3) surrounding the fiber core (2) for carrying the laser radiation in the fiber core (2), with a first outer fiber cladding (4) surrounding the inner fiber cladding (3), which has a smaller refractive index than the inner fiber cladding (3) as a result of longitudinally aligned air-filled capillaries (5), and with a second outer fiber cladding (6) surrounding the first outer fiber cladding (4), wherein the first outer fiber cladding (4) has a capillary-free longitudinal section (8), the second outer fiber cladding (6) has according to the invention scattering centers (7) at least in the region of the capillary-free longitudinal section (8) for scattering the laser radiation emerging from the inner fiber cladding (3) along the capillary-free longitudinal section (8).