基于锁模激光器的FBG电流传感器高速解调系统

doi:10.3969/j.issn.0255-8297.2024.06.001

应用科学学报 ›› 2024, Vol. 42 ›› Issue (6): 903-911.doi: 10.3969/j.issn.0255-8297.2024.06.001

基于锁模激光器的FBG电流传感器高速解调系统

王华¹, 何群¹, 谭如超¹, 武冬¹, 方一诺², 马跃辉², 严开全², 牟成博²

1. 国网江西省电力有限公司信息通信分公司, 江西南昌 330096;
2. 上海大学特种光纤与光接入网重点实验室, 上海 200444

收稿日期:2022-12-10 出版日期:2024-11-30 发布日期:2024-11-30
通信作者: 王华,高工,研究方向为光纤通信、光器件、光纤传感等。E-mail:wzh_hf@163.com E-mail:wzh_hf@163.com
基金资助:
国网江西省电力有限公司科技项目（No.521835200038）资助

High Speed Demodulation System for FBG Current Sensor Based on Mode-Locked Laser

WANG Hua¹, HE Qun¹, TAN Ruchao¹, WU Dong¹, FANG Yinuo², MA Yuehui², YAN Kaiquan², MOU Chengbo²

1. Information and Communication Branch of State Grid Jiangxi Electric Power Co., Ltd., Nanchang 330096, Jiangxi, China;
2. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China

Received:2022-12-10 Online:2024-11-30 Published:2024-11-30

摘要/Abstract

摘要： 智能电网可靠、安全、经济、高效的发展目标，对电流参数的检测速率提出了更高的需求。本文开展了锁模激光器对基于磁致伸缩效应的光纤布拉格光栅（fiber Bragg grating,FBG）电流传感器复用实现高速解调的实验研究，首次将时间拉伸-色散傅里叶变换（time-stretch dispersive Fourier transformation,TS-DFT）技术与光纤电流传感技术进行了结合。固定于磁致伸缩材料表面的FBG能够感知通电螺线管产生的磁场所引发的材料应变。TS-DFT技术可将应力引起的FBG波长偏移映射为时域上反射脉冲的时延偏移实现高速解调。在0~4.5 A电流范围内对2个传感FBG的波长复用进行监测，系统的解调速率高达69.6 MHz，该技术在电流或磁场传感领域有广阔的应用前景。

关键词: 锁模激光器, 时间拉伸-色散傅里叶变换, 磁致伸缩效应, 光纤布拉格光栅, 光纤电流传感器

Abstract: 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.

Key words: mode-locked laser, time-stretch dispersive Fourier transformation, magnetostrictive effect, fiber Bragg grating (FBG), fiber current sensor

中图分类号:

P751.1

王华, 何群, 谭如超, 武冬, 方一诺, 马跃辉, 严开全, 牟成博. 基于锁模激光器的FBG电流传感器高速解调系统[J]. 应用科学学报, 2024, 42(6): 903-911.

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.

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基于锁模激光器的FBG电流传感器高速解调系统

High Speed Demodulation System for FBG Current Sensor Based on Mode-Locked Laser

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