发表机构
Massachusetts Institute of Technology; University of Maryland, Baltimore County; NASA Goddard Space Flight Center; Center for Research and Exploration in Space Science and Technology, NASA/GSFC; University of Arizona; Vescent Technologies（麻省理工学院; 马里兰大学巴尔的摩县分校; 美国宇航局戈达德太空飞行中心; NASA/GSFC空间科学与技术研究探索中心; 亚利桑那大学; Vescent科技公司）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研制了一种基于腔稳激光器和光学频率梳的高短期稳定性频率参考源，用于未来空间VLBI任务，其100 MHz信号的Allan偏差在1秒时为3.26e-14，满足任务需求。
AI 中文摘要
天基甚长基线干涉测量（VLBI）相较于地面VLBI技术，能够提高图像的角分辨率和时间分辨率。未来的空间VLBI（sVLBI）任务瞄准的观测频率高于现代地面VLBI，因此这些任务将需要比标准氢钟更稳定的频率参考源。虽然现有的天基应用频率参考源侧重于长期稳定性，但在本研究中，我们提出了一种具有高短期稳定性、旨在用于sVLBI任务的频率参考源。该参考源利用了激光干涉空间天线（LISA）任务中腔稳激光器的发展成果，以及商业界为研制坚固、可空间化的光学频率梳所做的努力。我们描述了该系统的实现和实验结果，并给出了其走向太空飞行的路径。该系统在100 MHz频率参考信号上，1秒时的Allan偏差为$3.26 \ imes 10^{-14}$，10秒时为$6.00 \ imes 10^{-15}$，30秒时为$6.73 \ imes 10^{-15}$，并表明该性能满足未来sVLBI任务的需求。
英文摘要
Space-based Very Long Baseline Interferometry (VLBI) can improve both the angular and temporal resolution of images over terrestrial VLBI techniques. Future space VLBI (sVLBI) missions are targeting higher observation frequencies than modern, terrestrial VLBI, and therefore these missions will require higher stability frequency references than standard hydrogen masers. While existing frequency references for space-based applications have concentrated on long-term stability, in this effort, we present a frequency reference with high short-term stability intended for sVLBI missions. This reference leverages developments in cavity-stabilized lasers from the Laser Interferometer Space Antenna (LISA) mission and commercial efforts towards a robust, space-qualifiable optical frequency comb. We describe the implementation and experimental results of this system with a path to spaceflight, which demonstrates an Allan deviation of $3.26 \times 10^{-14}$ at 1 second, $6.00 \times 10^{-15}$ at 10 seconds, and $6.73 \times 10^{-15}$ at 30 seconds for the 100 MHz frequency reference signal, and show that this performance meets the needs of future sVLBI missions.
Comments8 pages, 7 figures
