Developments of Space Debris Laser Ranging Technology Including the Applications of Picosecond Lasers
Developments of Space Debris Laser Ranging Technology Including the Applications of Picosecond Lasers
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DOI：
10.3390/app112110080
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发表时间：
2021-10
期刊：
影响因子：
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通讯作者：
Haifeng Zhang;Mingliang Long;Huarong Deng;S. Cheng;Zhibo Wu;Zhongping Zhang;A. Zhang;Jiantao Sun
中科院分区：
文献类型：
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作者：
Haifeng Zhang;Mingliang Long;Huarong Deng;S. Cheng;Zhibo Wu;Zhongping Zhang;A. Zhang;Jiantao Sun
碎片激光测距作为确定和预测空间碎片轨道的一种准确而有效的方法正受到相当大的注意。本文介绍了DLR的一些技术，如高脉冲重复频率（PRF）激光脉冲、大口径望远镜、望远镜阵列、多站接收等。本文还介绍了上海天文台DLR皮秒激光器。已经进行了几百圈的空间碎片激光测距测量。在DLR上成功实现了平均功率4.2W、脉冲重复频率1kHz、波长532nm的双脉冲皮秒激光器，这是DLR技术首次达到亚分米级的测距精度。分析了皮秒脉宽激光的传输特性及其在激光测距中的传输优势。德国航天中心系统利用平均功率高的脉冲群皮秒激光模式跟踪了雷达截面积为0.91平方米的小碎片，其测距距离最远达1726.8公里，相当于1000公里距离的雷达截面积为0.1平方米。预计这些工作将提供新技术，以进一步提高DLR的性能。
Debris laser ranging (DLR) is receiving considerable attention as an accurate and effective method of determining and predicting the orbits of space debris. This paper reports some technologies of DLR, such as the high pulse repetition frequency (PRF) laser pulse, large-aperture telescope, telescope array, multi-static stations receiving signals. DLR with a picosecond laser at the Shanghai Astronomical Observatory is also presented. A few hundred laps of space debris laser-ranging measurements have been made. A double-pulse picosecond laser with an average power of 4.2 W, a PRF of 1 kHz, and a wavelength of 532 nm has been implemented successfully in DLR, it’s the first time that DLR technology has reached a ranging precision at the sub-decimeter level. In addition, the characteristics of the picosecond-pulse-width laser transmission with the advantages of transmission in laser ranging were analyzed. With a mode of the pulse-burst picosecond laser having high average power, the DLR system has tracked small debris with a radar cross-section (RCS) of 0.91 m2 at a ranging distance up to 1726.8 km, corresponding to an RCS of 0.1 m2 at a distance of 1000 km. These works are expected to provide new technologies to further improve the performance of DLR.