| 基于Sagnac干涉仪的光纤直流磁场传感研究 |
| |
| 引用本文： | 宋章启,张学亮,阳明晔,胡永明.基于Sagnac干涉仪的光纤直流磁场传感研究[J].半导体光电,2007,28(6):874-877. |
| |
| 作者姓名： | 宋章启 张学亮 阳明晔 胡永明 |
| |
| 作者单位： | 国防科技大学,光电科学与工程学院,湖南,长沙,410073;国防科技大学,光电科学与工程学院,湖南,长沙,410073;国防科技大学,光电科学与工程学院,湖南,长沙,410073;国防科技大学,光电科学与工程学院,湖南,长沙,410073 |
| |
| 摘 要： | 将磁致伸缩材料粘贴单模光纤构成的光纤磁传感探头接入Sagnac光纤环的一端,外加交流磁场将探头周围的直流磁场加载到4.9kHz的高频信号上,建立了基于Sagnac干涉仪的光纤直流磁场传感实验系统.采用锯齿波相位调制的方法,将干涉仪系统相位偏置在π/2附近,通过测量所加高频信号的幅度,实现了对直流磁场的测量.实验得到系统信号稳定性为0.4%,磁场分辨率为4.3nT,并给出36.75g铁块经过磁传感探头时系统的响应信号.
|
| 关 键 词： | 光纤光学 Sagnac干涉仪 磁场传感 锯齿波调制 |
| 文章编号： | 1001-5868（2007）06-0874-04 |
| 收稿时间： | 2007-03-12 |
| 修稿时间： | 2007年3月12日 |
Study of Fiber DC Magnetic Sensor Based on Sagnac Interferometer |
| |
| SONG Zhang-qi,ZHANG Xue-liang,YANG Ming-ye,HU Yong-ming.Study of Fiber DC Magnetic Sensor Based on Sagnac Interferometer[J].Semiconductor Optoelectronics,2007,28(6):874-877. |
| |
| Authors: | SONG Zhang-qi ZHANG Xue-liang YANG Ming-ye HU Yong-ming |
| |
| Abstract: | A fiber DC magnetic sensor based on Sagnac interferometer is proposed and experimentally demonstrated. The magnetic transducer made by SM fiber bonded on a magnetostrictive material is joined at one end of the Sagnac fiber loop. A stable quadrature phase is obtained by using a saw-tooth phase modulation method. The DC magnetic field signal around the magnetic transducer is carried by a 4.9 kHz magnetic dither, and the DC magnetic field signal can be achieved by measuring the amplitude of the 4. 9 kHz in the output of the Sagnac interferometer. The results show the signal stability is less than 0. 4%, and the magnetic field resolution is 4.3 nT. When a 36.75 g iron is passing by, the response of the sensor is presented. |
| |
| Keywords: | fiber optics Sagnac interferometer magnetic field sensing sawtooth phase modulation |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
