250 W end-pumped Nd:YAG laser with direct pumping into the upper laser level.
A high-power longitudinally pumped Nd:YAG laser using direct pumping into the upper laser level is demonstrated. With an absorbed pump power of 438 W an output power of 250 W was realized, which results in an optical-to-optical efficiency of 57%. To the best of our knowledge, this is the first demonstration of a high-output power 885 nm pumped laser design.
Frede
Maik
M
Laser Zentrum Hannover e.V., Hannover, Germany. mf@lzh.de
Wilhelm
Ralf
R
Kracht
Dietmar
D