Method and arrangement for generating a laser beam having a differing beam profile characteristic by means of a multi-clad fiber
AssigneeTRUMPF Laser- und Systemtechnik GmbH
InventorsRudolf Huber, Wolfgang Andreasch, Martin Huonker
Life of this patent
Estimating the term…
Abstract
The invention concerns a method for generating a laser beam (3) with different beam profile characteristics, whereby a laser beam (2) is coupled into one fiber end (1a) of a multi-clad fiber (1), in particular a double-clad fiber, and emitted from the other fiber end (1b) of the multi-clad fiber (1) and whereby, to generate different beam profile characteristics of the output laser beam (3), the input laser beam (2) is electively coupled either at least into the inner fiber core (4) of the multi-clad fiber (1) or at least into at least one outer ring core (6) of the multi-clad fiber (1), as well as a corresponding arrangement (10).
Claims15
A method for generating a laser beam (3) with different beam profile characteristics,
- characterised in that:
- a laser beam (2;
- 61, 62) is coupled into the fibre end (1a) of a multi-clad fibre (1), in particular a double-clad fibre, and emitted from the other fibre end (1b) of the multi-clad fibre (1), and
- for the generation of different beam profile characteristics of the output laser beam (3), either the input laser beam (2;
- 61, 62) is electively either coupled at least into the inner fibre core (4) of the multi-clad fibre (1) or at least into at least one outer ring core (6) of the multi-clad fibre (1) or, electively, a first laser beam (61) is coupled at least into the inner fibre core (4) of the multi-clad fibre (1) and a different, second laser beam (62) is coupled at least into at least one outer ring core (6) of the multi-clad fibre (1).
An arrangement (10;
- 20;
- 30;
- 60) for generating a laser beam (3) with different beam profile characteristics,
- characterised by:
- a multi-clad fibre (1), in particular a double-clad fibre with one inner fibre core (4) and at least one outer ring core (6), and
- a switchable device (11, 13;
- 21, 22;
- 23;
- 31, 32;
- 65) with at least two switch positions in which an input laser beam (2;
- 61, 62) is electively coupled either at least into the inner fibre core (4) of the multi-clad fibre (1) or at least into at least one outer ring core (6) of the multi-clad fibre (1) or, electively, a first laser beam (61) is coupled at least into the inner fibre core (4) of the multi-clad fibre (1) and a different, second laser beam (62) is coupled at least into at least one outer ring core (6) of the multi-clad fibre (1).
Dependencies are inferred from the claim text.