半导体抽运碱金属蒸气激光器(DPAL)是一种具有广阔应用前景的激光器，近年来发展迅速。使用碱金属铷所需要的中心波长为780 nm的半导体激光器线阵作抽运源，采用平面衍射光栅搭建Littrow外腔将线宽压窄至0.13 nm，并使用斩波器将半导体激光变为脉冲输出形式。采用透镜组合对窄线宽半导体激光进行光束扭转整形，整形后光斑近似为方形。半导体激光经线宽压窄和光束整形后，被聚焦进铷蒸气泡，泡内充入79 kPa甲烷作为缓冲气体。控制铷蒸气泡温度为145 ℃，注入谐振腔的抽运光峰值功率为最高13 W时，获得了峰值功率2.8 W的线偏振铷激光输出，光光转换效率达21%。

Diode pumped alkali vapor laser (DPAL) has applications in many areas and is developed rapidly in recent years. A diode laser array with center wavelength of 780 nm is used as the pump source for the Rb laser, and a Littrow external cavity is built with a plane diffraction grating to narrow the linewidth of the diode laser to 0.13 nm. A chopper is used to change the continuous diode laser to pulsed laser. The diode laser is beam shaped, a lens group is used to twist the beam to nearly square shape. After linewidth narrowing and beam shaping, the diode laser is focused on a Rb vapor cell which is filled with Methane as buffer gas at the pressure of 79 kPa. With the maximum peak power of 13 W injected into the Rb laser resonator and the temperature of the cell kept at about 145 ℃, the linearly polarized Rb laser with peak power of 2.8 W is obtained, and the optical to optical efficiency is 21%.