正十边形光子晶体光纤布拉格光栅传感特性的研究

Research on Sensing Properties of Regular Decagon Photonic Crystal Fiber Bragg Grating

研究了正十边形对称结构光子晶体光纤布拉格光栅(PCFBG)特性,分析了不同空气孔层数以及不同占空比对布拉格光栅反射谱的影响。在此基础上,对正十边形光子晶体光纤光栅的传感特性进行了研究。研究表明:随着温度的增加,该光纤光栅的反射谱谐振波长明显向长波方向偏移;随着应力的改变,光纤光栅的反射谱谐振波长变化趋势不明显。该光栅具有对温度敏感,对应变不敏感的特点。这种空气孔排列为正十边形对称结构的光子晶体光纤光栅有望应用在光子晶体光纤光栅的传感领域中。

Properties of regular decagonal symmetry in photonic crystal fiber Bragg grating （PCFBG） were studied. The influence of different air hole layers and different duty ratio on the reflection spectrum of Bragg grating was analyzed. On this basis, the sensing characteristics of the ten-edge shaped photonic crystal fiber gratings were studied. Research results show that the reflection spectrum of the fiber grating resonance wavelength will shift significantly to the long wavelength with the temperature increases. However, with the change of strain, the reflection spectrum of the fiber grating resonance wavelength is not obvious. So its sensing characteristics show that the grating is sensitive to temperature and insensitive to strain. The air holes arranged in regular decagonal symmetry photonic crystal fiber grating are expected to be better applied in the field of photonic crystal fiber sensing grating.