Passively mode-locked Yb:YAG thin-disk laser with pulse energies exceeding 13 microJ by use of an active multipass geometry.
We demonstrate the generation of high-energy picosecond pulses directly from a thin-disk laser oscillator by employing a self-imaging active multipass geometry. Stable single-pulse operation has been obtained with an average output power in excess of 50 W, excluding a cw background of 8%, at a repetition rate of 3.8 MHz. Self-starting passive mode locking was accomplished using a semiconductor saturable absorber mirror. The maximum pulse energy was 13.4 microJ at a pulse duration of 1.36 ps with a time-bandwidth product of 0.34. Single-pass external frequency doubling with a conversion efficiency of 60% yielded >28 W of average power at 515 nm.
Neuhaus
Joerg
J
TRUMPF-Laser GmbH + Company KG, Aichhalder Strasse 39, 78713 Schramberg, Germany. joerg.neuhaus@uni-konstanz.de
Kleinbauer
Jochen
J
Killi
Alexander
A
Weiler
Sascha
S
Sutter
Dirk
D
Dekorsy
Thomas
T