Chen Y J, Lin Y F, Huang J H, Gong X H, Luo Z D, Huang Y D
Opt Lett. 2015 Nov 1;40(21):4927-30. doi: 10.1364/OL.40.004927.
End-pumped by a continuous-wave 976 nm diode laser, efficient 1522 nm laser operation was demonstrated in an Er:Yb:GdAl(3)(BO(3))(4) crystal when a sapphire crystal was used as a heat diffuser. A continuous-wave 1522 nm laser with a maximum output power of 750 mW and slope efficiency of 36% was realized at an absorbed pump power of 4.1 W. The pulse performances of an acousto-optic Q-switched laser with various repetition frequencies were investigated in detail. In a repetition frequency range of 1-10 kHz, 1522 nm pulse lasers with a slope efficiency of about 10%, peak output power at the kilowatt level, and width of about 50 ns were first obtained in an Er:Yb:GdAl(3)(BO(3))(4) crystal pumped by a continuous-wave diode laser. The results indicate that the crystal is a promising gain medium for an actively Q-switched 1.5 μm laser.
当使用蓝宝石晶体作为热扩散器时，在连续波976nm二极管激光器的端面泵浦下，在Er:Yb:GdAl(3)(BO(3))(4)晶体中实现了高效的1522nm激光运转。在4.1W的吸收泵浦功率下，实现了最大输出功率为750mW、斜率效率为36%的连续波1522nm激光器。详细研究了具有不同重复频率的声光调Q激光器的脉冲性能。在1-10kHz的重复频率范围内，首次在连续波二极管激光器泵浦的Er:Yb:GdAl(3)(BO(3))(4)晶体中获得了斜率效率约为10%、峰值输出功率在千瓦级且脉宽约为50ns的1522nm脉冲激光器。结果表明，该晶体是一种有前景的用于主动调Q 1.5μm激光器的增益介质。
