Ultra-High Voltage NV Center Magnetic Sensing System Based on Power over Fiber

作者：Linfeng Zhan, Chenggang Guan, Chaoqiang Dong, Xuelong Fan, Qingtao Guo, Weiqi Wang, Yifan Xiao, Xuan Chen, Junchang Huang, Xueyou Zhang, Wenxin Jiang, Jiaoli Gong · 发表于：Photonics · 年份：2025 · DOI：10.3390/photonics12111093 · 被引用次数：1 · 研究领域：Magneto-Optical Properties and Applications、Magnetic Field Sensors Techniques、Advanced Fiber Optic Sensors

Aiming to address the insulation and power supply challenges faced by electrical measurement in ultra-high voltage (UHV) environments, this study proposes and implements a nitrogen-vacancy (NV) center magnetic sensing system based on Power over Fiber (PoF) technology. The system adopts a high-voltage and low-voltage separation design, realizing the isolated transmission of electrical energy and the reliable recovery of measurement signals through an optical fiber link. The sensing unit on the high-voltage side is composed of NV center sensors, microwave excitation modules, and signal processing modules. Its power supply is provided by an independently developed high-power laser power converter (LPC) assembly via 830 nm optical fiber laser transmission. Under an optical input of 10 W, this assembly can achieve an electrical output of 4.88 W with a conversion efficiency of 48.9%. The experimental results show that the system can operate stably in a simulated UHV environment; by optimizing modulation parameters, the optimal magnetic measurement sensitivity reaches 6.1 nT/Hz1/2. This research provides a safe and reliable solution for the power supply and precise sensing of high-potential side equipment in UHV scenarios, and demonstrates the application potential of PoF technology in advanced sensing for power systems.