Eye-safe solid-state lasers that operate at 2 mu m wavelength have many app
lications in medical, remote sensing and military technologies. With a 3-W
CW laser-diode pumping, we obtained 760 mW 2.01 mu m Tm: YAG laser under CW
operation. The slope efficiency was 44% and the optical to optical efficie
ncy reached 36%. In the acousto-optic Q-switched operation, laser pulses wi
th the energy of 1.2mJ and 380 ns FWHM width have been achieved. (C) 1999 O
ptical Society of America.