Method and arrangement for generating a laser beam having a differing beam profile characteristic by a multi-clad fiber

A method of generating a laser beam with different beam profile characteristics, the method comprising:

• guiding a first input laser beam by a first optical fiber to a fiber end of a multi-clad fiber, wherein the multi-clad fiber has an inner fiber core and at least one outer ring core;
• guiding a second input laser beam by a second optical fiber to the fiber end of the multi-clad fiber;
• coupling the first input laser beam and the second input laser beam into the fiber end of the multi-clad fiber, comprising at least one of:
• coupling the first input laser beam at least into the inner fiber core of the multi-clad fiber, or
• coupling the second input laser beam at least into the at least one outer ring core of the multi-clad fiber;
• and
• generating an output laser beam by interaction of the first input laser beam and the second input laser beam with the multi-clad fiber, wherein a beam profile characteristic of the output laser beam differs depending upon the coupling of the first input laser beam and the second input laser beam into the fiber end of the multi-clad fiber.