LD泵浦腔外倍频高转换效率Nd^(3+)∶GdVO_4固体激光器

LD Pumped Laser with High Conversion Efficiency Nd3+∶GdVO4 Solid-state by Extra Cavity Double Frequency

通过合理设计精密调控各元件和温控电流,得到了平均功率为70mW,脉冲宽度为22ns,重复频率为14kHz,峰值功率高达230W的Nd3+∶GdVO4/Cr4+YAG红外脉冲激光器.先采用双凸透镜组合成的望远镜系统对1063nm的红外激光进行扩束,再对该光束聚焦,最后经双轴晶体LBO倍频后,得到了平均功率为40.6mW,脉冲宽度为16ns,重复频率为14kHz,峰值功率高达181W的绿光激光输出,1063nm→532nm的转换效率高达58%.测量了532nm的光谱线宽曲线.解释了该聚焦方法比单一薄透镜效果明显好的原因,并指出了这种聚焦方法的使用对象.

Based on reasonable designing, precise temperature controlling of the Cr^4＋ ： YAG, Nd ： GdVO4 and LD, passively Q-switched infrared laser was obtained with average output power of 70 mW, pulse duration of 22 ns,repetition rate of 14 kHz,and peak power of 230 W. By a piece of type-Ⅱ critical phase matching biaxial crystal LBO for extra-cavity and for the compound system of telescope and Lens second- harmonic generation,green laser at 532 nm was achieved with average power of zi0.6 mW,pulse duration of 16 ns, and peak power of 181 W. And the curve of linear width of 532 nm green laser via incident power was obtained. It is explained that focusing effects for the compound system was better than lens＇ and the compound system focusing approach appropriate to crystal properties was discussed.