Red, green and infrared three-wavelength lasers generated from LD side-pumped Nd3+:YAG crystal

To obtain 1064 nm/532 nm/660 nm three wavelength lasers operating simultaneously or singly, a novel LD side-pumped Nd3+:YAG laser system with acousto-optic Q-switched and nonlinear frequency conversion technologies was investigated. When the three wavelength lasers output singly and the Pumping power was 103 W, 1064 nm laser was 14.5 W and the green and red lasers reached 4.7 W and 1.6 W, respectively, at the repetition rate of 10.5 kHz and 11.5 kHz. When they worked simultaneously, the red, green and infrared lasers were obtained with the output power distribution of 1.0 W at 660 nm, 4.3 W at 532 nm and 10.1 W at 1064 nm, and the instability was less than 2% within 3 h.