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采用助熔剂法生长了不同配比的激光自倍频晶体Yb:YAl3(BO3)4(Yb:YAB).测量了晶体的室温吸收谱和荧光光谱,室温下仅存在一个吸收带,主吸收峰在976nm处,能与InGaAsLD有效耦合.在1.03μm处存在一个强荧光峰.测定了晶体的热膨胀系数,在平行与c轴方向的热膨胀系数较大,α2=9.4×10-6/K,约为a轴方向的3.5倍.在10％的Yb:YAB晶体中,以入射功率为11W,波长为977nm的光纤耦合二极管激光器泵浦得到4.3W的基频光波输出,斜效率为48％;在同样实验条件下得到了1.1w的自倍频绿光输出,总转换效率为10％.
The crystal Yb: YAl3 (BO3) 4 (Yb: YAB) was grown by flux method at room temperature.At the same time, there was only one absorption band at room temperature, and the main absorption peak At 976 nm, it can be effectively coupled with InGaAsLD, and there is a strong fluorescence peak at 1.03 μm. The thermal expansion coefficient of the crystal is measured and the coefficient of thermal expansion in the parallel and c-axis directions is large, α 2 = 9.4 × 10 -6 / K Which is 3.5 times as much as the a-axis. In the 10% Yb: YAB crystal, a 4.3W fundamental frequency light output is obtained by fiber-coupled diode laser with an incident power of 11W and a wavelength of 977nm. The slope efficiency is 48% Under the same experimental conditions have been 1.1w self-doubled green output, the total conversion efficiency of 10%.