Title :
Yb-doped rod-type fiber amplifier with 2 kW average power
Author :
Otto, Hans-Jürgen ; Jauregui, Cesar ; Stutzki, Fabian ; Modsching, Norbert ; Limpert, Jens ; Tünnermann, Andreas
Author_Institution :
Inst. of Appl. Phys., Friedrich-Schiller-Univ. Jena, Jena, Germany
Abstract :
The effect of mode instabilities has become a strong limitation for the average power scaling of fiber lasers and amplifiers with nearly diffraction-limited beam quality. In this contribution it is shown that the output average power of rod-type fiber amplifiers can be efficiently increased well beyond the threshold of mode-instabilities. This way a new average output power record of 2 kW, with an M2 of 3, emitted from a 1 meter long rod-type fiber amplifier has been achieved.
Keywords :
Q-factor; laser beams; laser modes; laser stability; optical fibre amplifiers; ytterbium; M2; average power scaling; beam quality factor; fiber lasers; mode instabilities; nearly diffraction-limited beam quality; output average power; rod-type fiber amplifier; size 1 m; Fiber lasers; Laser beams; Laser modes; Optical fiber amplifiers; Power amplifiers; Power generation; Power lasers;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2014 Conference on
Conference_Location :
San Jose, CA
