Experimental study of partially end-pumped Nd：YVO4 slab laser with hybrid resonator operation

To attain high power laser with high beam quality,experiments were performed for partially end-pumped Nd:YVO4 slab laser.With the help of a self-assembly 5bar LD array stack and the wave-guide beam reshaping system,the pumped light was coupled into slab crystal.38W CW laser beam was attained with hybrid resonator operation when pumped power was 134W,and the slope efficiency was 44%.When the output laser power was 38W,M2 value in unstable resonator direction was 1.56,and M2 value in stable resonator direction was 1.78.The experimental results indicated that high power laser could be attained with high beam quality,concerning with good thermal effect.The input-output power curve was not flat-topping and reflexed.The experiment results indicated that this laser could be improved more.