【摘要】 提出了两种简单的磁致伸缩调制型光纤Bragg光栅的温度补偿方法。利用磁场和磁致伸缩材料对光纤光栅的Bragg波长进行调制 ,将一对光纤光栅按特定的结构固定 ,使得磁致伸缩效应对两只光纤光栅的Bragg波长的调制效果相互叠加而温度的影响相互抵消。补偿后的磁场调制型光纤光栅温度在 2 2～ 80℃的范围内 ,波长变化仅为0 11nm ,其温度灵敏度是温度补偿前的 1 10。更多还原

【Abstract】 Two simple techniques for the compensation of the temperature effects in fiber Bragg gratings (FBGs) tuned by magnetostrictive transducers are demonstrated. The Bragg wavelengths were tuned by the magnetic field through the magnetostrictive transducer and two FBG′s are arranged in such a way that the magnetostrictive effects on the two gratings are added together, while the temperature effects are cancelled out. Using these techniques, it has been able to reduce the temperature sensitivity of the sensor by more than 10 times, the additional wavelength shift due to the temperature was only 0 11 nm within the range of 22℃～80℃.更多还原