A proportion-integral-derivative closed-loop frequency-locking method for improving the accuracy and sensitivity of a magnetometer

Proportion-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...

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Bibliographic Details
Published in:Laser physics letters 2020-10, Vol.17 (10), p.105205
Main Authors: Deng, Shengli, Zhang, Weidong, Guo, Hao, Wu, Dajin, Li, Zhonghao, Wen, Huanfei, Tang, Jun, Han, Xingcheng, Ma, Zongmin, Liu, Jun, Li, Yanjun
Format: Article
Language:English
Subjects:
magnetometer
nitrogen-vacancy center
proportion-integral-derivative closed-loop frequency-locking
sensitivity
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Summary:Proportion-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 Hz−1/2 to 10 nT Hz−1/2. It proves an effective method to improve the sensitivity of the spin-based sensors.
ISSN:1612-2011
1612-202X
DOI:10.1088/1612-202X/abad43