▎ 摘　　要

We report the Q-switched operation of a Tb3+ C-laser for the first time, to the best of our knowledge. The passive Q-switching was realized by a 15% Tb VLiYF4 gain medium and a single-layer graphene saturable absorber. An average output power of 744 mW at 544 nm was achieved with slope efficiency of 41%, pulse width of 2.9 mu s, and repetition rate of 38.7 kHz. The corresponding pulse energy and peak power were calculated to be 19.2 mu J and 6.6 W, respectively. (C) 2020 Optical Society of America