High-power dual-rod Yb:YAG laser.
We describe a diode-pumped Yb:YAG laser that produces 1080 W of power cw with 27.5% optical optical efficiency and 532 W Q-switched with M(2)=2.2 and 17% optical-optical efficiency. The laser uses two composite Yb:YAG rods separated by a 90 degrees quartz rotator for bifocusing compensation. A microlensed diode array end pumps each rod, using a hollow lens duct for pump delivery. By changing resonator parameters we can adjust the fundamental mode size and the output beam quality. Using a flattened Gaussian intensity profile to calculate the mode-fill efficiency and clipping losses, we compare experimental data with modeled output power versus beam quality.
E C
EC
Honea
R J
RJ
Beach
S C
SC
Mitchell
J A
JA
Skidmore
M A
MA
Emanuel
S B
SB
Sutton
S A
SA
Payne
P V
PV
Avizonis
R S
RS
Monroe
D G
DG
Harris