We demonstrate an efficient tunable diode-end-pumped continuous wave (CW) Yb3+:Lu2SiO5 (Yb:LSO) laser. With a 5 at.-% Yb3+-doped sample, we obtained 3.24-W output at 1080 nm for 7.3 W of absorbed pump power, the corresponding slope efficiency was 55%. And the laser wavelength could be tuned from 1017 to 1084 nm.

Effective diode-pumped continuous wave (CW) tunable laser action of a new alloyed crystal Yb:LYSO is demonstrated. The alloyed LYSO crystal possesses the desirable physical and laser performance of La2SiO5 (LSO), as well as the favorable growth properties and costs of Y2SiO5 (YSO) in the same time. With a 5 at.-% Yb:LYSO sample, the output power of 2.84 W at 1085 nm and an optical-to-optical conversion efficiency of 54.5% are achieved. Its laser wavelength can be tuned over a broad range of 81 nm, from 1030 to 1111 nm.

报道了一个激光二极管(LD)抽运多波长连续输出的激光器和一个被动调Q的固体激光器。该激光器的增益材料是一种新型掺Yb3+的晶体Yb3+∶Lu2SiO5(Yb∶LSO)。当吸收的抽运功率为2.57 W时,连续输出的最大功率为490 mW,斜率效率为22.2%,光-光转换效率为14.2%,激光阈值为299 mW,输出激光波长为1084 nm。多波长输出时,波长调谐范围为1034～1085 nm。利用InGaAs可饱和吸收镜实现调Q输出时, 斜率效率为3.0%,激光波长为1058 nm。脉冲重复频率为25～39 kHz,重复频率随着抽运功率的增加而增加。

报道了以掺Yb介质硅酸镥钇晶体为增益介质的激光行为。在自由运转的条件下,在1086 nm的中心波长处用2.5%的输出耦合镜得到7.8 W的连续激光输出,相应的斜效率为64%。利用SF14棱镜作为腔内调谐元件,激光输出的调谐范围为1014～1091 nm。

分析了面向先进制造技术、“新概念”激光**等应用的(1 μm波段)高平均功率、大能量激光晶体的国内外研究现状,并指出了其未来主要发展趋势。