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
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.
nitrogen-vacancy center quantum sensing signal processing 
Chinese Optics Letters
2023, 21(11): 111201

采用光纤熔接技术将薄壁柚子微结构光纤与单模光纤进行熔接制作成探针式的压强传感器,该微结构光纤一端开放的空气孔可以与外界压强相连通,实现压强响应,获得了0.70 nm/MPa的压强灵敏度,并且具有良好的线性度。通过有限元法模拟和实验结果对比发现该微结构光纤传感器存在LP01和LP11模式的干涉,并证明了该传感器具有良好的稳定性和重复性。

光纤传感器 微结构光纤 压强传感 模式干涉 fiber optics sensors microstructured fiber pressure sensing mode interference 
2021, 41(13): 1306015

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