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在原子重力计的声光调制器中对射频相位噪声传输进行实验研究

Kanxing Weng, Peishuang Ding, Guanghui Wang

|July 30, 2025

概括

来自声光调制器 (AOM) 的无线电频率 (RF) 阶段噪声限制了原子干涉计的灵敏度. 优化AOM对齐和使用双通配置显著减少这种噪声,提高惯性传感器的精度.

科学领域:

量子传感是一种量子感应.
原子物理原子物理
在惯性导航中使用惯性导航.

背景情况:

阶段噪声是原子干扰度惯性传感器的一个关键限制.
现有的研究往往忽略了来自声光调制器 (AOM) 的射频 (RF) 阶段噪声.

研究的目的:

为了研究AOM射频相位噪声对原子重力计的影响.
量化AOM射频相位噪声的传输机制和影响.

主要方法:

对AOM RF相位噪声进行系统的实验分析.
阶段噪声功率光谱密度分析.
单通道和双通道AOM配置的比较.

主要成果:

在单通 AOM 中,低于最佳的光束对齐会放大射频相位噪声 (31%的增加).
压电晶体中的机械共振导致30-40赫兹频段的噪声.
双通式AOM可以将调整引起的噪声放大率降低50%以上.

结论:

在原子重力测量中,AOM射频相位噪声是关键因素.
双通配置和优化对齐是减轻AOM诱导的相位噪声的有效策略.
这些发现提升了拉曼激光系统的相位噪声建模,并提高了量子惯性传感器的稳定性.

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