Red, Yellow and Green Laser Generated Simultaneously from Laser-Diode Side-Pumped Nd:YAG Crystals in a Cruciform Cavity

A cruciform laser system is presented for red (660 nm), yellow (589 nm) and green (532 nm) continuous wave generation. On the basis of considering the optimal power ratio and good spatial overlap of the two fundamental beams, the maximum output power of 589 nm laser reaches 3.8 W when the pumping power of Nd:YAG (A) and Nd:YAG (B) are 311.5 W and 261.8 W, respectively. At the same time, the red and green lasers are also obtained with the output power distribution of 2.5 W at 660 nm and 15 W at 532 nm. The corresponding beam quality factors are M_x² = 4.93, M_y² = 5.01 at 589 nm, M_x² = 4.51, M_y² = 4.85 at 660 nm, M_x² = 4.12, M_y² = 3.96 at 532 nm, respectively.