title: 250 W end-pumped Nd:YAG laser with direct pumping into the upper laser level.
abstract: 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.
authors.affiliation: Laser Zentrum Hannover e.V., Hannover, Germany. mf@lzh.de
authors.forename: Maik
authors.initials: M
authors.lastname: Frede
authors.forename: Ralf
authors.initials: R
authors.lastname: Wilhelm
authors.forename: Dietmar
authors.initials: D
authors.lastname: Kracht