A proportion-integral-derivative closed-loop frequency-locking method for improving the accuracy and sensitivity of a magnetometer
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2020-08-26 |
| Journal | Laser Physics Letters |
| Authors | Shengli Deng, Weidong Zhang, Hao Guo, Wu Da-Jin, Zhonghao Li |
| Institutions | North University of China, The University of Osaka |
| Citations | 5 |
Abstract
Section titled āAbstractāProportion-integral-derivative (PID) closed-loop frequency-locking (CLFL) technology has been demonstrated to improve the magnetic field sensitivity of spin-based sensors based on the nitrogen-vacancy (NV) color centers in diamond. First, we analyse the undulation effect of the fluorescence quantum yield of NV centers with a magnetic field. The valley value of the magnetic resonance spectrum have been differential into a zero to insensitive to intensity fluctuations of fluorescence quantum yield of NV centers based on the PID-CLFL technology. Then, the sensitivity of the magnetic field improved from 40 nT Hzā1/2 to 10 nT Hzā1/2. It proves an effective method to improve the sensitivity of the spin-based sensors.