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    Journals >Chinese Optics Letters >Volume 21 >Issue 11 >Page 111201 > Article
    • Chinese Optics Letters
    • Vol. 21, Issue 11, 111201 (2023)
    SNR enhancement of magnetic fields measurement with the diamond NV center using a compound filter system | Editors' Pick
    An Ye1, Dingyuan Fu1, Mingming Wu1, Jiahao Guo1, Tianze Sheng1, Xiaolin Li1、*, Shangqing Gong1、2、3, and Yueping Niu1、2、3
    Author Affiliations
  • 1School of Physics, East China University of Science and Technology, Shanghai 200237, China
  • 2Shanghai Engineering Research Center of Hierarchical Nanomaterials, Shanghai 200237, China
  • 3Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, Shanghai 200237, China
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    DOI: 10.3788/COL202321.111201 Cite this Article Set citation alerts
    An Ye, Dingyuan Fu, Mingming Wu, Jiahao Guo, Tianze Sheng, Xiaolin Li, Shangqing Gong, Yueping Niu. SNR enhancement of magnetic fields measurement with the diamond NV center using a compound filter system[J]. Chinese Optics Letters, 2023, 21(11): 111201 Copy Citation Text show less

    Abstract

    Nitrogen-vacancy (NV) centers in diamond are progressively favored for room-temperature magnetic field measurement. The signal to noise ratio (SNR) optimization for NV diamond magnetometry generally concentrates on signal amplitude enhancement rather than efficient noise processing. Here, we report a compound filter system combining a wavelet denoising method and an adaptive filter for the realization of an efficient weak magnetic measurement with a high SNR. It allows enhanced magnetic field measurement with an average SNR enhancement of 17.80 dB at 50 nT within 500 mHz to 100 Hz and 14.76 dB at 500 mHz within 50 nT to 1100 nT. The introduction of this system in NV diamond magnetometry is aimed to improve signal quality by effectively eliminating the noise and retaining ideal signals.

    Keywords

    Wf(a,b)=1a∫−∞+∞f(t)ψ*(t−ba)dt,

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    ψi,j(t)=a0−i/2ψ(a0−it−j),

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    y(n)=∑l=0L−1ωl(n)x(n−l),

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    ωl(n+1)=ωl(n)+µδ+xT(n)x(n)e(n)x(n),

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    e(n)=s(n)−y(n),

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    E(e2(n))=E((s0(n)+(n0(n)−y(n)))2).

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    E(e2(n))=E(s02(n))+E((n0(n)−y(n))2).

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    An Ye, Dingyuan Fu, Mingming Wu, Jiahao Guo, Tianze Sheng, Xiaolin Li, Shangqing Gong, Yueping Niu. SNR enhancement of magnetic fields measurement with the diamond NV center using a compound filter system[J]. Chinese Optics Letters, 2023, 21(11): 111201
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