拉曼激光束轮廓不均匀性对星载量子加速度计的影响
Impact of Raman lasers beam profile inhomogeneities on a spaceborne quantum accelerometer
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中文总结 AI 辅助
本研究通过数值模拟与解析方法，分析了拉曼激光束轮廓不均匀性对星载量子加速度计干涉仪相位的影响，并证明采用高质量光学元件与大尺寸原子源可将相位误差降至约1毫弧度，对应低10⁻¹² m·s⁻²的加速度测量精度。
中文摘要 AI 辅助
我们报告了激光束轮廓不均匀性对太空中量子加速度计加速度测量的影响研究。该传感器基于德尔塔-kick准直的玻色-爱因斯坦凝聚体，采用低弹道膨胀源，并采用基于拉曼双衍射分束器序列的干涉仪配置，该配置最适合微重力环境。我们以功率谱密度的形式表征相位和强度波动，并通过基于随机绘制的激光轮廓的数值模拟以及解析处理，计算它们对干涉仪相位的影响，对所有原子轨迹进行平均。我们表明，高质量的光学元件（如为引力波探测器所实现的光学元件）与大的初始尺寸原子源相结合，将能把干涉仪相位偏差和波动降低到约1毫弧度，对应于低10⁻¹² m·s⁻²范围的加速度。
英文摘要
We report on the study of the impact of laser beam profile inhomogeneities on the acceleration measurements of a quantum accelerometer in space. This sensor uses a low ballistic expansion source based on delta-kick collimated Bose-Einstein condensates, and an interferometer configuration based on a sequence of Raman double diffraction beamsplitters, best suited to the microgravity environment. We characterize both phase and intensity fluctuations in terms of power spectral densities and calculate their impact on the interferometer phase, averaging over all trajectories of the atoms, via numerical simulations based on randomly drawn laser profiles as well as via analytical treatments. We show that high quality optics, such as those realized for gravitational wave detectors, combined with large initial size atomic sources, will allow to reduce interferometer phase bias and fluctuations to the order of 1 mrad corresponding to accelerations in the low 10 -12 m.s -2 range.
发表机构
- Observatoire de Paris - Université PSL, Sorbonne Université, Université de Lille（巴黎天文台-巴黎文理研究大学，索邦大学，里尔大学）
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