We demonstrate an Yb:YAG single-crystal fiber laser with 251 W output power in continuous-wave and an optical efficiency of 44%. This performance can be explained by the high overlap between pump and signal beams brought by the pump guiding and by the good thermal management provided by the single-crystal fiber geometry. The oscillator performance with a reflectivity of the output coupler as low as 20% also shows high potential for power amplification.
© 2012 Optical Society of America
Lasers and Laser Optics
Original Manuscript: March 30, 2012
Revised Manuscript: May 28, 2012
Manuscript Accepted: June 1, 2012
Published: July 11, 2012
Xavier Délen, Stefan Piehler, Julien Didierjean, Nicolas Aubry, Andreas Voss, Marwan Abdou Ahmed, Thomas Graf, Francois Balembois, and Patrick Georges, "250 W single-crystal fiber Yb:YAG laser," Opt. Lett. 37, 2898-2900 (2012)