Method and arrangement for generating a laser beam having a differing beam profile characteristic by coupling different input laser beams into different cores of a multi-clad fiber

US11215761B2 · kind B2 · utility

Assignee

• TRUMPF LASER- UND SYSTEMTECHNIK GMBH · DE

Inventors

• Rudolph Huber · Spaichingen, DE
• Wolfgang Andreasch · Landgut Burg, DE
• Martin Huonker · Rottweil, DE

Key dates

• Filing date: Apr 30, 2019
• Grant date: Jan 4, 2022
• Expiry date: Apr 30, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K2103/06
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Methods and systems for generating a laser beam with different beam profile characteristics are provided. In one aspect, a method includes coupling an input laser beam into one fiber end of a multi-clad fiber, in particular a double-clad fiber and emitting an output laser beam from the other fiber end of the multi-clad fiber. To generate different beam profile characteristics of the output laser beam, the input laser beam is electively coupled either at least into the inner fiber core of the multi-clad fiber or at least into at least one outer ring core of the multi-clad fiber, or a first sub-beam of the input laser beam is coupled into at least into the inner fiber core of the multi-clad fiber and a second, different sub-beam of the input laser beam is coupled at least into the at least one outer ring core of the multi-clad fiber.