A 1 W homemade MQW-LDA pumped Nd: YAG laser is reported here,continuous output power of 112 mW and overall optical efficiency of 10% were obtained. By using Q-swiching, the peak power of 355 W and the pulse width of 40 ns have been observed at pulse repetition rate of 1 kHz. When the pulse repetition rate is 10 kHz, an average output power of 43.7 mW with single pulse width of 70 ns was achieved.