Yb∶Y_2O_3陶瓷薄片激光器获得10.5 W连续激光输出

室温下采用中心波长约970 nm准直输出的大功率激光二极管模块作为抽运源,端面抽运双程吸收的腔型结构,抽运原子数分数为8%的Yb:Y2O3多晶透明陶瓷片获得连续激光输出。抽运阈值功率为7 W,当抽运功率达到35 W时,获得优化连续激光输出功率为10.5 W,光光转换效率为30%,斜率效率为37.5%。激光输出功率随抽运功率基本呈线性增长。采用更高功率抽运源、优化谐振腔结构和减小热效应的影响,Yb∶Y2O3陶瓷激光器的输出功率和效率将会得到进一步提高。

10.5 W Continuous-Wave Output from Yb∶Y2O3 Ceramic Disk Laser

A contimuous-wave (CW) output has been obtained from a polycrystalline 8% mole ratio Yb∶Y2O3 ceramic disk laser with end-pumping and double-pass absorption cavity, which is end-pumped by a collimated high-power laser diode with the central wavelength located at 970 nm, at room temperature. The threshold pump power of the laser is 7 W, and under pump power of 35 W a CW output power of 10.5 W at 1078 nm is obtained, with optical-optical conversion efficiency of 30% and slope efficiency of 37.5%. There exists a rough linear rise for the output power with the pump power. The higher output power and efficiency can be expectable by adopting higher pump power, optimizing the cavity parameters and decreasing influence of thermal effect.