Actively Q-switched laser performance comparison between Nd:Lu0.15Y0.85VO4 and Nd:Lu0.33Y0.37Gd0.3VO4 mixed crystals

Abstract

By using acousto optic (AO) modulator as active Q switch, the diode pumped actively Q switched Nd:Lu 0.15 Y 0.85 VO 4 and Nd:Lu 0.33 Y 0.37 Gd 0.3 VO 4 lasers are realized. The average output power and the pulse width under different AO repetition rates are measured. The actively Q switched laser perfor mances for two kind mixed crystals are compared for the first time. The experimental results show that the actively Q switched Nd:Lu 0.33 Y 0.37 Gd 0.3 VO 4 laser can generate shorter pulse width with higher peak power in comparison with the actively Q switched Nd:Lu 0.15 Y 0.85 VO 4 laser. Due to broader fluorescence line width, the triple mixed crystal Nd:Lu 0.33 Y 0.37 Gd 0.3 VO 4 is a promising laser medium for shorter Q switched pulse with higher peak power.