近年来,对光纤传感器的研究取得了相当大的进展。并在工业、医疗、宇航和国防等部门获得越来越广泛地应用。与其他传感器相比,光纤传感器具有以下优点:1)光纤传感器不怕各种电磁干扰,不怕高温,且电气绝缘性能良好;2)光纤传感器可以测量许多物理量及化学量,如压力、温度、位移、应变、扭矩、电磁场 In recent years, considerable progress has been made in the research of optical fiber sensors. And in the industrial, medical, aerospace and defense departments are more and more widely used. Compared with other sensors, the optical fiber sensor has the following advantages: 1) The optical fiber sensor is not afraid of various kinds of electromagnetic interference, is not afraid of high temperature, and has good electrical insulation performance; 2) The optical fiber sensor can measure many physical and chemical quantities such as pressure, temperature, Strain, torque, electromagnetic field