基于全光纤萨格纳克干涉仪的温度不敏感磁场测量  

Temperature-insensitive magnetic-field measurement using all-fiber Sagnac interferometers

作　　者：文峰[1] 武保剑[1] 李智[1] 李述标[1] 

机构地区：[1]电子科技大学光纤传感与通信教育部重点实验室,成都611731

出　　处：《物理学报》2013年第13期153-157,共5页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(973计划)(批准号:2011CB301703);国家自然科学基金(批准号:61271166)资助的课题~~

摘　　要：研究了双折射磁光光纤萨格纳克(Sagnac)干涉仪透射谱的磁场和温度敏感性.实验表明,干涉仪透射谱会随着温度的增加向短波长移动(温度系数为0.435nm/C),其波长依赖性则随着磁场的增加而降低.据此,通过调节干涉仪内偏振控制器状态实现了温度不敏感的磁场测量,磁场系数为189mW/T2,实验结果与理论分析一致.Magnetic field and temperature dependence of Sagnac interferometers consisting of birefringent magneto-optic fibers is inves- tigated. Experimental results show that the transmission spectrum of the all-fiber Sagnac interferometer moves towards the shorter wavelength side with the increase in temperature （temperature coefficient -0.435 nm/℃）, and the transmissivity becomes wavelengthinsensitive for a larger magnetic induction. And then, the temperature-insensitive magnetic field measurement is achieved by adjusting the polarization controller within the interferometer, and the magnetic field coefficient is 189 mW/T2 in the experiment, which is in agreement with the theoretical results.

关 键 词：磁场测量 磁光效应 双折射 萨格纳克干涉仪 

分 类 号：TH744.3[机械工程—光学工程]