Compact, efficient diode-end-pumped Nd：GdVO4 slab continuous-wave 912-nm laser

A fiber-coupled laser-diode （LD） end-pumped Nd:GdVO₄ slab continuous-wave （CW） 912-nm laser and an LD bar end-pumped Nd:GdVO₄ slab CW 912-nm laser are both demonstrated in this paper.Using the fiber-coupled LD of end-pumped type,a highest CW 912-nm laser output power of 10.17 W is obtained with a high optical-to-optical conversion efficiency of 24.6% and a slope efficiency of 34.5%.The measured M 2 factors of beam quality in x and y directions are 5.3 and 5.1,respectively.Besides,an LD bar of end-pumped type is used to realize CW 912-nm laser output,which has the advantages of compactness and low cost.When the pump power is 38.8 W,the output power is 8.87 W and the measured M 2 factors of beam quality in x and y directions are 16 and 1.31,respectively.In order to improve the beam quality of the 912-nm laser at x direction,a new quasi-concentric laser resonator will be designed,and an LD bar end-pumped Nd:GdVO₄ slab high-power CW 912-nm TEM₀₀ laser will be realized in the future.