通过一种脉冲钛蓝宝石激光器抽运铷蒸汽激光器，研究了抽运铷蒸汽激光器的动力学特性。铷蒸汽泡在室温下充满70 kPa甲烷和6 atm氦气。激光器的平均输出功率为208 mW，从吸收的779.8 nm泵浦光到795 nm激光的转换效率为19%。该激光器的峰值功率为693 W，重复率为3 kHz, 脉冲宽度(FWHM)100 ns。实验表明，在高泵浦光强DPALs中，Rb-He-CH4混合物的再吸收将是一个重要的限制。可以推导出在418 K时(缓冲气体：70 kPa甲烷和6 atm氦气，室温)，泵浦源LDs的线宽为0.9 nm时，Rb-He-CH4系统的泵浦强度阈值大于200.6 kW/cm2。

In this letter, numerical simulation and experimental study of a radial-slab solid-state laser are presented. The laser includes four crossing-slabs pumped by four Xe flashlamps. The numerical simulation of coherent intensity in the near field and the far field indicates that the laser with the structure can improve the quality of output beam compared with incoherent beam combination. The radial-slab solid-state laser is fabricated, and initial experiments are carried out at a pulse repetition of 1 Hz. Nine beams in the near field and one combined beam in the far field are obtained in our initial experiment. The experimental results are consistent with the numerical analysis in the coherent condition. The results show that coherent beam combination is obtained by this laser.