The development goals of reliable, safe, economical, and efficient smart grid place higher demands on the detection rate of current parameters. This paper presents an experimental investigation of high-speed demodulation of fiber Bragg grating (FBG) current sensor, based on magnetostrictive effect and mode-locked laser multiplexing. For the first time, time-stretch dispersive Fourier transformation (TS-DFT) is combined with fiber current sensing techniques. FBG, fixed on the magnetostrictive material, detects the material strain caused by the magnetic field generated by the energized solenoid, enabling current sensing. TS-DFT maps the wavelength shift of FBG caused by stress to the time-domain delay shift in the reflected pulse, facilitating high-speed demodulation. The wavelength multiplexing of the two sensing FBGs is monitored in the current range of 0 to 4.5 A, achieving a demodulation rate of up to 69.6 MHz. This method has broad application prospects in the field of current or magnetic field sensing.
WANG Hua, HE Qun, TAN Ruchao, WU Dong, FANG Yinuo, MA Yuehui, YAN Kaiquan, MOU Chengbo
. High Speed Demodulation System for FBG Current Sensor Based on Mode-Locked Laser[J]. Journal of Applied Sciences, 2024
, 42(6)
: 903
-911
.
DOI: 10.3969/j.issn.0255-8297.2024.06.001
[1] 王剑. 智能电网继电保护技术及其应用研究[J]. 现代工业经济和信息化, 2022, 12(6): 268-269, 314. Wang J. Research on smart grid relay protection technology and its application [J]. Modern Industrial Economy and Informationization, 2022, 12(6): 268-269, 314. (in Chinese)
[2] 范凯迪. 电力调度自动化中智能电网技术的应用[J]. 新型工业化, 2022, 12(3): 202-204, 211. Fan K D. Application of smart grid technology in power dispatching automation [J]. The Journal of New Industrialization, 2022, 12(3): 202-204, 211. (in Chinese)
[3] Chen J, Liu B, Zhang H. Review of fiber Bragg grating sensor technology [J]. Frontiers of Optoelectronics in China, 2011, 4(2): 204-212.
[4] Cooper D J F, Coroy T, Smith P W E. Time-division multiplexing of large serial fiber-optic Bragg grating sensor arrays [J]. Applied Optics, 2001, 40(16): 2643-2654.
[5] Chung W H, Tam H Y, Wai P K A, et al. Time-and wavelength-division multiplexing of FBG sensors using a semiconductor optical amplifier in ring cavity configuration [J]. IEEE Photonics Technology Letters, 2005, 17(12): 2709-2711.
[6] Liu C, Shen T, Wu H B, et al. Applications of magneto-strictive, magneto-optical, magnetic fluid materials in optical fiber current sensors and optical fiber magnetic field sensors: a review [J]. Optical Fiber Technology, 2021, 65: 102634.
[7] Silva R M, Martins H, Nascimento I, et al. Optical current sensors for high power systems: a review [J]. Applied Sciences, 2012, 2(3): 602-628.
[8] Satpathi D, Moore J A, Ennis M G. Design of a Terfenol-D based fiber-optic current transducer [J]. IEEE Sensors Journal, 2005, 5(5): 1057-1065.
[9] Dante A, Lopez J D, Carvalho C C, et al. A compact FBG-based magnetostrictive optical current sensor with reduced mass of Terfenol-D [J]. IEEE Photonics Technology Letters, 2019, 31(17): 1461-1464.
[10] Goda K, Jalali B. Dispersive Fourier transformation for fast continuous single-shot measurements [J]. Nature Photonics, 2013, 7: 102-112.
[11] Dennis M L, Putnam M A, Kang J U, et al. Grating sensor array demodulation by use of a passively mode-locked fiber laser [J]. Optics Letters, 1997, 22(17): 1362-1364.
[12] 王志, 贺瑞敬, 刘艳格. 时间拉伸色散傅里叶变换在被动锁模光纤激光器研究中的应用[J]. 中国激光, 2019, 46(5): 0508002. Wang Z, He R J, Liu Y G. Applications of time-stretch dispersion Fourier transform technique in study on passively mode-locked fiber lasers [J]. Chinese Journal of Lasers, 2019, 46(5): 0508002. (in Chinese)
[13] Wang C, Yao J P. Ultrafast and ultrahigh-resolution interrogation of a fiber Bragg grating sensor based on interferometric temporal spectroscopy [J]. Journal of Lightwave Technology, 2011, 29(19): 2927-2933.
[14] Lei M, Zou W W, Li X, et al. Ultrafast FBG interrogator based on time-stretch method [J]. IEEE Photonics Technology Letters, 2016, 28(7): 778-781.
[15] 魏群. 螺线管磁场分布特征[J]. 长春工业大学学报(自然科学版), 2003, 24(3): 68-70. Wei Q. A study on the magnetic field distribution characteristics of coils [J]. Journal of Changchun University of Technology (Natural Science Edition), 2003, 24(3): 68-70. (in Chinese)
[16] Wang L, Wang B W, Wang Z H, et al. Magneto-thermo-mechanical characterization of giant magnetostrictive materials [J]. Rare Metals, 2013, 32(5): 486-489.
