Due to the birefringence effect of the fiber Bragg grating, the splitting of the two Bragg wavelengths corresponding to the fast axis and slow axis is observed, and the maximum of the splitting is 0.66nm.

• 由于光纤Bragg光栅的双折射效应；当有温度和应变的影响时；可观察到分别对应于快轴和慢轴的光纤光栅反射波中心波长的分离；可得到的最大差值为0.；66nm。