一种新的基于光纤光栅测电磁场的解调系统

摘要

提出了一种新的使用光纤光栅测电磁场的方法,依据磁场与光纤光栅偏振相关损耗(PDL)成正比的原理,运用1/4波片转化左、右旋圆偏振光为线偏振光,根据所检测出的两偏振光光强推算出磁场强度,并论证了其可行性.%This paper puts forward a new method of measuring magnetic field by using fiber grating, Based on the magnetic field proportional to the polarization dependent loss ( PDL) of optical fiber grating, Using a 1/4 wave plate, transformation left-hand and right-hand circularly polarized light into linearly polarized light, According to the detected two polarized light intensity calculate the magnetic field strength,and proves its feasibility.