空间固体激光器是星载激光测高系统的重要载荷，也是先进激光器的典型代表。星载激光测高的应用需求和星载应用环境决定了空间激光器的技术特点和规律，使得空间固体激光器成为了先进性、可靠性、成熟性和小型轻量化的技术与工艺统一。分析了星载激光测高应用的空间固体激光器高可靠激光谐振腔技术、高重频窄脉宽微脉冲多光束激光器技术、LD/光纤/固体相融合技术等方面的发展现状，介绍了单光子阵列推扫式激光雷达用空间固体激光器的技术突破，并对卫星激光测高固体激光器技术发展进行了展望。

As a typical advanced laser, spaceborne solid state laser is one of the key components used in spaceborne laser altimetry systems. The requirement and working condition of spaceborne laser altimetry determine the technical characteristics of this kind laser source. The spaceborne solid state laser integrates the advanced, high reliable, light weight technologies and mature process, thus can meet the specific requirements of laser altimetry used in space environment condition. The development of high reliable laser resonator technology, high repetition rate narrow pulse width micro-pulse multi-beam laser technology, LD/fiber/solid-state integration technology for spaceborne laser altimetry and the current challenges were reviewed and analyzed, the significant breakthrough of multi-beam laser for spaceborne single photon scanning ladar system was proposed. At last, the development trend of spaceborne laser were summaried.