Fiber laser with specially designed a - and uncoupling

摘要

Laser active optical fiber (50) for a fiber laser (100), with a laser-active and doped fibre core (26), a the fiber core (26) surrounding undoped pump core (24) and a the pump core (24) surrounding cladding (22), and with an inlet area (eb), on which a pump light by a pumping light source in the pump core (24), as well as with an outlet region (ab), on which a working jet (20) the fiber core (26) leaves, characterized in that in the inlet region of a first cone prism (12) and in the exit region (ab) a second cone prism (18) is provided, wherein the second cone prism (18) a first conical inner surface, which in the outlet region (ab) of the end face (sf2) of the fiber, wherein the second cone prism (18) a conical aptertur with a second conical surface, the to the exiting working beam (20) is adapted to.