[1] Mihailovic P, Petricevic S. Fiber optic sensors based on the Faraday effect[J]. Sensors, 21, 6564(2021).

[2] Wu J H, Zhang X F. Recent progress of all fiber optic current transformers[C], 134-143(2020).

[3] Zhao J, Shi L, Sun X H. Design and performance study of a temperature compensated ±1100-kV UHVdc all fiber current transformer[J]. IEEE Transactions on Instrumentation and Measurement, 70, 7001206(2021).

[4] Danisi A, Soto J L B, Gomez A et al. Final design of the Fiber-Optic Current Sensor bundle in the ITER buildings[J]. Journal of Instrumentation, 17, C01053(2022).

[5] Xin G F, Zhu J, Luo C M et al. Polarization error analysis of an all-optical fibre small current sensor for partial discharge[J]. Journal of Electrical Engineering & Technology, 15, 2199-2210(2020).

[6] Wu J H, Zhang X F, Chen L et al. Research on measurement technology of ship leakage current by all-fiber optic current sensor[J]. IEEE Access, 9, 160268-160276(2021).

[7] Wu J H, Zhang X F, Chen L et al. Research progress of all-fiber optic micro-current sensor[J]. Laser & Optoelectronics Progress, 59, 1700004(2022).

[8] Bohnert K, Gabus P, Nehring J et al. Temperature and vibration insensitive fiber-optic current sensor[J]. Journal of Lightwave Technology, 20, 267-276(2002).

[9] Zhang H, Jiang J Z, Zhang Y et al. A loop all-fiber current sensor based on single-polarization single-mode couplers[J]. Sensors, 17, 2674(2017).

[10] Zhang H. A fiber current sensor based on single light path detection and loop scheme[J]. Laser & Optoelectronics Progress, 55, 060604(2018).

[11] Przhiyalkovskiy Y V, Starostin N I, Morshnev S K et al. Polarization dynamics of light propagating in bent spun birefringent fiber[J]. Journal of Lightwave Technology, 38, 6879-6885(2020).

[12] Xiao Z H, Cheng S, Zhang G Q et al. Research on sensitivity characteristic of fiber optic current transformer[J]. Electric Power Automation Equipment, 37, 212-216(2017).

[13] Huang D N, Srinivasan S, Bowers J E. Compact Tb doped fiber optic current sensor with high sensitivity[J]. Optics Express, 23, 29993-29999(2015).

[14] Huang Y H, Zhou M H, Yu A D et al. Noise suppression for weak current measurement based on neural-network-assisted UHV FOCS[J]. Optics & Laser Technology, 151, 107995(2022).

[15] Wang Z Y, Xia L, Cheng R et al. Short-time and weak signal demodulation for fiber optic current sensors based on backpropagation neural network[J]. Optics & Laser Technology, 149, 107872(2022).

[16] Zhong J, Bi X W, Shu Q et al. Partial discharge signal denoising based on singular value decomposition and empirical wavelet transform[J]. IEEE Transactions on Instrumentation and Measurement, 69, 8866-8873(2020).

[17] Xie Z D, Wang Y, Han L. Research on signal de-noising of all-fiber current sensor based on sym10 wavelet[J]. Industrial Instrumentation & Automation, 9-12(2018).

[18] Li Y S, Li X, Ouyang J et al. Research of signal processing of OCT based on sequential Kalman filter[J]. Electrical Measurement & Instrumentation, 53, 16-21(2016).

[19] Yang W L, Pilozzi A, Huang X D. An overview of ICA/BSS-based application to Alzheimer's brain signal processing[J]. Biomedicines, 9, 386(2021).

[20] Yang L, Wang H Q, Wang K et al. Spectral information unmixing of mixed pigment based on clustering optimization FastICA algorithm[J]. Acta Optica Sinica, 40, 0530001(2020).

[21] Liu M, Niu C P, Ji Z X et al. Wavelet de-noising method of all-fiber optical current transformer based on variational mode decomposition[J]. Electrical Engineering, 22, 7-11(2021).

[22] Han L, Li J J. Application of VMD algorithm in signal denoising of all-fiber current sensor[J]. Heilongjiang Electric Power, 43, 487-492(2021).

[23] Yu M, Zhang Y L, He Y T et al. Variational mode decomposition and permutation entropy method for denoising of distributed optical fiber vibration sensing system[J]. Acta Optica Sinica, 42, 0706005(2022).

[24] Dragomiretskiy K, Zosso D. Variational mode decomposition[J]. IEEE Transactions on Signal Processing, 62, 531-544(2014).

[25] Barczak K, Cimek J, Stępień R et al. Measurements of Verdet constant in heavy metal oxide glasses for magneto-optic fiber current sensors[J]. Optical Materials, 123, 111942(2022).

[26] Chong K H, Choi W S, Chong K T. Analysis of dead zone sources in a closed-loop fiber optic gyroscope[J]. Applied Optics, 55, 165-170(2016).

[27] Pang F B, Li P, Wei X et al. Analysis on fault mechanism of fiber-optical current transformers with sine wave modulation[J]. Automation of Electric Power Systems, 44, 153-160(2020).

[28] Hu B, Xiao H, Li J G et al. Noise analysis and SNR optimization design of fiber optical current transformers[J]. High Voltage Engineering, 43, 654-660(2017).

[29] Li Y S, Liang T, Zhang X K et al. Lawson-norm constrained generalized lncosh based adaptive algorithm for sparse system identification[J]. Journal of Electronics & Information Technology, 44, 654-660(2022).

[30] Wang P F, Gao Y B, Wu M H et al. A denoising method for fiber optic gyroscope based on variational mode decomposition and beetle swarm antenna search algorithm[J]. Entropy, 22, 765(2020).

[31] Luo Y Y, Yao Y B, Huang C et al. Deformation feature extraction and analysis based on improved variational mode decomposition[J]. Geomatics and Information Science of Wuhan University, 45, 612-619(2020).

[32] Fu W L, Tan J W, Wang K. Semi-supervised fault diagnosis of bearings based on the VMD dispersion entropy and improved SVDD with modified grey wolf optimizer[J]. Journal of Vibration and Shock, 38, 190-197(2019).

[33] Wang X B, Yang Z X, Yan X A. Novel particle swarm optimization-based variational mode decomposition method for the fault diagnosis of complex rotating machinery[J]. IEEE/ASME Transactions on Mechatronics, 23, 68-79(2018).

[34] Zhang X, Miao Q, Zhang H et al. A parameter-adaptive VMD method based on grasshopper optimization algorithm to analyze vibration signals from rotating machinery[J]. Mechanical Systems and Signal Processing, 108, 58-72(2018).

[35] Zhang X, Li D Q, Li J et al. Grey wolf optimization-based variational mode decomposition for magnetotelluric data combined with detrended fluctuation analysis[J]. Acta Geophysica, 70, 111-120(2022).

[36] Heidari A A, Mirjalili S, Faris H et al. Harris hawks optimization: algorithm and applications[J]. Future Generation Computer Systems, 97, 849-872(2019).

[37] Xu L, Cai D S, Shen W et al. Denoising method for Fiber Optic Gyro measurement signal of face slab deflection of concrete face rockfill dam based on sparrow search algorithm and variational modal decomposition[J]. Sensors and Actuators A: Physical, 331, 112913(2021).

[38] Naruei I, Keynia F, Molahosseini A S. Hunter-prey optimization: algorithm and applications[J]. Soft Computing, 26, 1279-1314(2022).

[39] Wang W B, Zhang X D, Wang X L. Chaotic signal denoising method based on independent component analysis and empirical mode decomposition[J]. Acta Physica Sinica, 62, 050201(2013).

[40] Li J Z, Li Z R, Zhang D H et al. Fabrication of λ/4 wave plate for fiber optic current transducer[J]. Infrared and Laser Engineering, 42, 2167-2172(2013).