Study on technique of diode-pumped Nd：YAG laser

The main technique of the diode-pumped solid laser is studied in this paper. It is emphasizes that at the lower pumping power, a nearly hemispherical cavity or big R cavity should be chosen to decrease the threshold of the laser, and at the higher pumping power a hemiconfocal cavity should be chosen to increase the output power and improve the lransformation efficiency. The designs of the coupled optical system should satisfy the mode match requirement of the laser cavity and pumping beams. The 8.3roW output power of TEM00 mode is obtained at the 86.4mW pumping power for Nd:YAG laser, the laser threshold is 12 mW.