偏振模耦合分布式光纤传感器空间分辨率研究

分析了偏振模耦合原理的分布式光纤传感器的自相干与互相干光；实验测量的干涉光证明了理论分析是正确的；利用偏振模耦合原理传感与白光干涉检测的分布式光纤传感器的空间分辨率是由光纤偏振色散系数与光源的谱宽决定的；由实验测量的偏振模耦合分布式光纤传感器的空间分辨率为6cm. 关键词： 光纤传感器 保偏光纤 空间分辨率 偏振模耦合

Study on spatial resolution of polarized-modes coupling distributed fiber optic sensor

Phenomena of self-coherence and mutual-coherence of the distributed fiber optic sensor based on the principle of polarized-mode coupling are analyzed. The inter ference characteristics measured by experiment validate the theoretical analysis . The spatial resolution of the distributed fiber optic sensor is determined by the polarized dispersion coefficients of polarization-maintaining fiber and the spectral width of the light source. The spatial resolution of the polarized-mode s coupling distributed fiber optic sensor measured by experiment is 6cm.