Abstract:

The laser diode array(LDA)end-pumped intra-cavity second harmonic generation 525 nm green laser was demonstrated by using 1 mm thick Yb:YAG crystal.The doping concentration is 10 at.%.The temperature of Yb:YAG crystal was controlled by thermo-electric cooler(TEC).The nonlinear optical crystal,LBO,at a type-Ⅰphase-matching direction of(θ,φ)=(90°,12.2°)was employed.With linear-type cavity,a CW output power of 244 mw at 525 nm green laser has been obtained when the incident power was 11.3 W.The optical conversion efficiency was 1.98%.

Key words: laser techniques, Yb:YAG crystal, 525 nm green laser, intra-cavity second harmonic generation solid-state laser