半导体激光抽运碱金属蒸汽激光器(DPAL)，可以提供高功率、高效率、近衍射极限的近红外连续激光输出，具有较其它传统高功率激光器更好的综合性能。其发射波长近大气传输窗口，且与半导体光电转换器件的高效吸收波长吻合，因此以DPAL为光源的太空激光传能系统在航空航天领域中具有很好的应用前景。首先概述DPAL的基本原理和结构，并对其作为能源用于同步地球卫星发射任务的方式和优势做了简要讨论。

Diode-laser pumped alkali vapor laser(DPAL) can provide near infrared continuous wave laser output with high power, high efficiency and near diffraction-limit. The laser wavelengths of DPALs are all in the atmospheric window, and fit the response spectra of photovoltaic cells perfectly. The laser-based energy tranfer system with DPAL as the laser source can be applied in the aerospace field potentially. The basic principle and structure of DPAL are introduced, and the advantages of using DPAL for power beaming in launching geo-synchronous satellites are also discussed.