空间激光测高技术发展及展望

空间激光测高技术通过在天基平台搭载脉冲激光测距仪，实现行星表面形貌信息获取，是开展对地和深空探测的重要手段。系统梳理了空间激光测高技术的发展历史和现状，提出应向多波束观测、近海及岛礁水下地形探测、激光主动多光谱探测这三个方向发展，建议开展近红外波段单光子探测、超窄带光学滤波、多光子分辨探测、单光子数据星上预处理、高转换效率激光及非线性光频变换关键技术研究，促进我国空间激光测高技术的进一步发展。

Development and review of space-based laser altimetry technology

Space-based laser altimetry, which measures the planetary surface topography based on time-of-flight ranging, is an important technology for earth and deep space exploration. The development history and current status were sorted out systematically and development in three directions was proposed, including multi-beam observation, underwater terrain observation of offshore and islands and laser active multispectral detection. It was suggested that some key technologies should be developed, including infrared single photon detection, ultra-narrowband optical filtering, multiphoton resolution detection, single-photon data on-board preprocessing and high conversion efficiency laser and nonlinear optical frequency conversion, to promote the further development of Chinese space laser altimetry technology.