【摘要】 研制了一种利用BiCaVIG晶体的磁光式光纤磁场传感器,并给出了传感头的基本结构。实测结果表明,在非线性小于±5%时传感器的线性动态范围优于70dB,噪声等效磁感应强度为1.5μT,传感器可用于脉冲弱磁场的测量。采用频谱分析的方法,测出了一种BiCaVIG晶体的法拉第效应动态响应特性,其-3dB频带宽度约为DC～200kHz。更多还原

【Abstract】 An optical fiber magnetic\|field sensor based on Faraday effect using BiCaVIG crystal is developed and the configuration of its sensing element is described. The experimental results indicate that its dynamic range is better than 70 dB with the nonlinearity less than ±5% and its noise equivalent magnetic flux density is 1.5μT. The sensor can be used to measure pulsed magnetic field. By the method of frequency spectrum analysis, the dynamic response characteristics of a kind of BiCaVIG crystal is measured and its -3dB bandwidth is about DC～200 kHz. 更多还原