Apparatuses for coupling radiation out of an optical fiber

US10830953B2 · kind B2 · utility

Assignee

• TRUMPF LASER GMBH · DE

Inventors

• Rudolf Huber · Spaichingen, DE
• Stefan Fuchs · Niedernberg, DE
• Marius Hezel · Bad Dürrheim, DE
• Julian Hellstern · Rottweil, DE
• Dominik Maier · Biesingen, DE

Key dates

• Filing date: Dec 19, 2019
• Grant date: Nov 10, 2020
• Expiry date: Dec 19, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/4296
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An apparatus for coupling out radiation from an optical fiber, includes a housing, and a stop having a stop opening for delimiting an output coupling angle of radiation that is coupled out of an output end of the optical fiber to a maximum output coupling angle with respect to a central axis of the stop opening, wherein the stop is arranged in the housing. The stop has a stop body made from a transparent material, the stop body has a first total internal reflection face for reflecting radiation that is coupled out of the output end of the optical fiber with greater output coupling angles than the maximum output coupling angle, and the stop body has a second total internal reflection face for reflecting radiation that propagates opposite to the radiation coupled out of the output end and is reflected back by a workpiece.