Zhou Yong, Wang Guiling, Yue Yinchao, Li Chengming, Lu Yuanfu, Cui Dafu, Hu Zhanggui, Xu Zuyan
Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China.
Opt Lett. 2009 Mar 15;34(6):746-8. doi: 10.1364/ol.34.000746.
We demonstrate high-efficiency ultraviolet (UV) laser generation in a nonlinear optical crystal BaAlBO3F2 (BABF); 355 nm UV light was generated by using a type I BABF crystal as a sum-frequency mixing of the fundamental light and the second harmonic from a picosecond Nd:YAG laser operated at a repetition rate of 10 Hz with a pulse duration of 20 ps. An output of 0.635 mJ for the third harmonic was obtained. The conversion efficiency was 26.4%. As far as we know, it was the first time that third-harmonic generation in BABF was achieved. Obviously, the BABF crystal is a promising UV nonlinear optical material because of its relatively large nonlinear coefficient and nonhygroscopicity.
我们展示了在非线性光学晶体氟硼酸钡铝（BaAlBO3F2，BABF）中高效产生紫外（UV）激光的过程；通过使用I型BABF晶体，将基频光与来自重复频率为10 Hz、脉冲持续时间为20 ps的皮秒Nd:YAG激光器产生的二次谐波进行和频混频，产生了355 nm的紫外光。获得了0.635 mJ的三次谐波输出。转换效率为26.4%。据我们所知，这是首次在BABF中实现三次谐波产生。显然，BABF晶体因其相对较大的非线性系数和不吸湿性，是一种很有前景的紫外非线性光学材料。
