Integrated NV (nitrogen vacancy) real-time vector magnetometer with high sensitivity and wide dynamic range
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2025-05-06 |
| Journal | Optics Express |
| Authors | Jianghao Fu, Yingjie Yang, Xuanhui Ren, Doudou Zheng, Yang Li |
| Institutions | North University of China, Taiyuan Institute of Technology |
Abstract
Section titled āAbstractāIn this paper, we present a real-time vector magnetic field tracking method based on nitrogen vacancy (NV) centers magnetic detection technique. By combining optical detection magnetic resonance (ODMR) spectroscopy with multi-channel microwave frequency modulation (FM) technology, magnetic field information for each NV axis is extracted from the fluorescence signals captured by a single photodetector (PD), followed by real-time demodulation. The real-time vector magnetic field tracking method is more than 28 times faster than the frequency hopping method. Subsequently, multi-channel feedback control is introduced to track the resonance frequency of each NV axis in real-time, enabling real-time vector tracking measurements. The experimental results show that the dynamic range of the AC magnetic field is Ā±148.8 ĀµT for the X, Ā± 151.2 ĀµT for the Y, and Ā±152.5 ĀµT for the Z. The sensitivities are 0.93nT/Hz, 0.76nT/Hz, 0.54nT/Hz respectively, which further validated the feasibility of the method. The method has potential applications in space exploration, medical diagnosis, navigation and other fields.