Total-reflection active-mirror laser with cryogenic Yb:YAG ceramics.
An efficient high-power laser operation has been demonstrated by using a cryogenic Yb:YAG composite ceramic with a total-reflection active-mirror arrangement. The composite ceramic, which had no high-reflection coating and was cooled with liquid nitrogen directly, showed four-level operation even at 67 kW/cm(3) of high pump density. A 273 W cw output power was obtained with 65% optical efficiency and 72% slope efficiency.
Furuse
Hiroaki
H
Institute for Laser Technology, 2-6 Yamada-oka, Suita, Osaka, Japan. furuse-h@ile.osaka-u.ac.jp
Kawanaka
Junji
J
Takeshita
Kenji
K
Miyanaga
Noriaki
N
Saiki
Taku
T
Imasaki
Kazuo
K
Fujita
Masayuki
M
Ishii
Shinya
S
D002516:Ceramics; D003080:Cold Temperature; D053844:Lasers, Solid-State; D015018:Ytterbium
D015018:Ytterbium