High-power diode-side-pumped rod Tm:YAG laser at 2.07 μm

We report a high-power diode-laser (LD) side-pumped rod Tm:YAG laser of around 2 μm. The laser was water-cooled at 8°C and yielded a maximum output power of 267 W at 2.07 μm, which is the highest output power for an all solid-state cw 2.07 μm rod Tm:YAG laser reported as far as we know. The corresponding optical–optical conversion efficiency was 20.7%, and the slope efficiency was about 29.8%, respectively.