Chinese Optics Letters, 2023, 21 (11): 111201, Published Online: Nov. 13, 2023  

SNR enhancement of magnetic fields measurement with the diamond NV center using a compound filter system

Author Affiliations
1 School of Physics, East China University of Science and Technology, Shanghai 200237, China
2 Shanghai Engineering Research Center of Hierarchical Nanomaterials, Shanghai 200237, China
3 Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, Shanghai 200237, China
Figures & Tables

Fig. 1. (a) Schematic of the experimental setup. The inset depicts the detailed section for ODMR. (b) The magnetic field sensitivity measured by continuous wave ODMR method. The blue and red lines show the sensitivity obtained from the direct outputs of measurements with and without the differential method.

下载图片 查看原文

Fig. 2. (a) Schematic of the analysis of signals at different scales. (b) Block diagram of the compound filter system using wavelet denoising approach and the adaptive filter based on wavelet transform.

下载图片 查看原文

Fig. 3. Comparison of the filtered effect for the ODMR signals with and without the filter when an extra magnetic field is generated as a (a) square or (b) sinusoidal wave. There is a great deal of noise contained in the differential signal (green), followed by original wavelet filtered signal (blue) and the signal after the adaptive filtering (red).

下载图片 查看原文

Fig. 4. Evaluation of the SNR of the filtered signal with respect to the parameters of adaptive filter. (a) Variation with the step size μ parameter at a δ parameter of 0.012. (b) Variation with the δ parameter at a μ parameter of 0.69.

下载图片 查看原文

Fig. 5. (a) Comparison of the filtering effects for ODMR signals caused by a weak magnetic field in the form of a sinusoidal wave. (b) Time domain and (c) frequency domain characteristics of the signals with and without the filter system at a fixed frequency. The green lines represent the differential signal; the blue and red lines represent the original wavelet filtered signal and the final filtered signal, respectively.

下载图片 查看原文

Fig. 6. (a) Sensitivity comparison between the differential signal (green) and final signals filtered by various filters, where we produce a varying magnetic field of about 100 nT at a frequency of 10 Hz. Inset shows comparison of the fidelity of desired signals after being filtered: compound (Wavelet+NLMS) filter (97.77%), Butterworth filter (96.97%), Gaussian filter (94.74%), and Median filter (93.41%). (b) SNR enhancement effect for desired non-stationary magnetic signals with different amplitudes and different frequency using our filter system. More detailed analysis for frequency and magnetic field amplitudes is shown in (c) and (d), for final signals filtered by compound filter (blue), Butterworth filter (orange), Gaussian filter (yellow), and Median filter (purple).

下载图片 查看原文

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.

引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!