arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2303.00239physics.atom-ph
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调制原子速度的自校准原子干涉陀螺仪

Self-Calibrated Atom-Interferometer Gyroscope by Modulating Atomic Velocities

Hong-Hui Chen, Zhan-Wei Yao, Ze-Xi Lu, Si-Bin Lu, Min Jiang, Shao-Kang Li, Xiao-Li Chen, Chuan Sun, Yin-Fei Mao, Yang Li, Run-Bing Li, Jin Wang, Ming-Sheng Zhan

摘要:

原子干涉仪陀螺仪由于其潜在的优越的长期稳定性和极低的漂移而引起了人们的广泛关注。对于这样的高精度仪器,需要进行自校准以实现绝对旋转测量。在这里,我们提出并证明了自校准的原子陀螺仪。利用激光频率的失谐量来控制原子的运动速度,从而调节陀螺的标度因子,实现了对陀螺的标定。调制决定了干涉条纹的阶数和初始相位,从而消除了由于干涉信号的周期性而引起的模糊。通过测量地球自转对标定方法进行了验证。长期稳定的自校准原子干涉仪陀螺在基础物理和长时间导航等领域有着重要的应用。

英文摘要:

Atom-interferometer gyroscopes have attracted much attention for their potential superior long-term stability and extremely low drift. For such high precision instrument, a self-calibration to achieve an absolute rotation measurement is highly demanded. Here we propose and demonstrate a self-calibration of the atomic gyroscope. The calibration is realized by using the detuning of laser frequency to control the atomic velocity thus to modulate the scale factor of the gyroscope. The modulation determines the order and the initial phase of the interference stripe, thus eliminates the ambiguity caused by the periodicity of the interferometric signal. The calibration method is verified by measuring the Earth's rotation. Long-term stable and self-calibrated atom-interferometer gyros can find important applications in the fields of fundamental physics and long-time navigation.

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