We demonstrate a diode-side-pumped TEM00 mode Nd:YAG laser with plane-convex resonator. The design of plane-convex resonator increases the loss of higher-order mode and the volume of fundamental mode, so the efficient
mode match between the pump light and the oscillating light and good beam quality is obtained. The continuous wave
output power of 13W is generated with M<sup>2</sup><sub>x</sub>=1.33 and M<sup>2</sup><sub>y</sub>=1.31. The 9W average output power of acousto-optically Q-switched laser with M<sup>2</sup><sub>x</sub>=1.29 and M<sup>2</sup><sub>y</sub>=1.27 is also achieved. When the Q-switching repetition rate is 10kHz, pulse width is 240ns with peak power of 3.8kW.