论文标题
使用点源原子干涉法改善稳定性的旋转传感
Rotation sensing with improved stability using point source atom interferometry
论文作者
论文摘要
点源原子干涉法是一种使用冷原子实现稳健，高敏性，旋转传感器的有前途的方法。但是，其比例因子，即干涉仪信号与实际旋转速率之间的比率取决于原子云的初始条件，这可能会随着时间的流逝而漂移并导致偏置不稳定，尤其是在询问时间短的紧凑型设备中。我们提出了两种稳定尺度因子的方法，一种依赖于基于模型的校正，该校正利用了干涉仪输出的多个特征和单次计算的工作之间的相关性，而另一种是一种自校准的方法，在该方法中，将已知的偏差旋转应用于其他所有测量，而不需要对基础模型的先验知识，但不需要降低传感器频带的先验知识。我们在实验上以完全抑制比例因子漂移，保持原始旋转灵敏度并允许在几个小时内进行无偏见的操作，从而实验表明这两种方案。
Point source atom interferometry is a promising approach for implementing robust, high-sensitivity, rotation sensors using cold atoms. However, its scale factor, i.e., the ratio between the interferometer signal and the actual rotation rate, depends on the initial conditions of the atomic cloud, which may drift in time and result in bias instability, particularly in compact devices with short interrogation times. We present two methods to stabilize the scale factor, one relying on a model-based correction which exploits correlations between multiple features of the interferometer output and works on a single-shot basis, and the other a self-calibrating method where a known bias rotation is applied to every other measurement, requiring no prior knowledge of the underlying model but reducing the sensor bandwidth by a factor of two. We demonstrate both schemes experimentally with complete suppression of scale factor drifts, maintaining the original rotation sensitivity and allowing for bias-free operation over several hours.
