Zhang Ning, Guo Qiang, Ye Wen, Feng Rui, Yuan Heng
Research Center for Quantum Sensing, Intelligent Perception Research Institute, Zhejiang Lab, Hangzhou 310000, China.
Division of Mechanics and Acoustic Metrology, National Institute of Metrology, Beijing 100029, China.
Sensors (Basel). 2022 Jul 12;22(14):5218. doi: 10.3390/s22145218.
Nitrogen-vacancy (NV) centers in diamonds play a large role in advanced quantum sensing with solid-state spins for potential miniaturized and portable application scenarios. With the temperature sensitivity of NV centers, the temperature fluctuations caused by the unknown environment and the system itself will mix with the magnetic field measurement. In this research, the temperature-sensitive characteristics of different diamonds, alongside the temperature noise generated by a measurement system, were tested and analyzed with a homemade NV magnetometer in a fiber-optic scheme. In this work, a multi-frequency synchronous manipulation method for resonating with the NV centers in all axial directions was proposed to compensate for the temperature fluctuations in a fibered NV magnetic field sensing scheme. The symmetrical features of the resonance lines of the NV centers, the common-mode fluctuations including temperature fluctuations, underwent effective compensation and elimination. The fluorescence change was reduced to 1.0% by multi-frequency synchronous manipulation from 5.5% of the single-frequency manipulation within a ±2 °C temperature range. Additionally, the multi-frequency synchronous manipulation improved the fluorescence contrast and the magnetic field measurement SNR through an omnidirectional manipulation scheme. It was very important to compensate for the temperature fluctuations, caused by both internal and external factors, to make use of the NV magnetometer in fiber-optic schemes' practicality. This work will promote the rapid development and widespread applications of quantum sensing based on various systems and principles.
钻石中的氮空位（NV）中心在利用固态自旋进行先进量子传感方面发挥着重要作用，适用于潜在的小型化和便携式应用场景。由于NV中心对温度敏感，未知环境和系统本身引起的温度波动会与磁场测量相互干扰。在本研究中，使用自制的光纤方案NV磁力计对不同钻石的温度敏感特性以及测量系统产生的温度噪声进行了测试和分析。在这项工作中，提出了一种多频同步操纵方法，用于在所有轴向与NV中心共振，以补偿光纤NV磁场传感方案中的温度波动。NV中心共振线的对称特征，包括温度波动在内的共模波动，得到了有效补偿和消除。在±2°C温度范围内，通过多频同步操纵，荧光变化从单频操纵的5.5%降低到了1.0%。此外，多频同步操纵通过全向操纵方案提高了荧光对比度和磁场测量信噪比。补偿由内部和外部因素引起的温度波动对于在光纤方案中实际应用NV磁力计非常重要。这项工作将推动基于各种系统和原理的量子传感的快速发展和广泛应用。
