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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。
The properties of a regular decagonal symmetric photonic crystal fiber Bragg grating (PCFBG) are studied. The influence of different air hole layers and different duty cycles on the reflection spectra of Bragg gratings is analyzed. On this basis, the sensing characteristics of the regular decagonal photonic crystal fiber gratings are studied. The results show that with the increase of temperature, the resonant wavelength of the FBG is obviously shifted to the longer wavelength. With the change of stress, the change of the resonant wavelength of the FBG is not obvious. The grating has the characteristics of being temperature-sensitive and insensitive to strain. The photonic crystal fiber grating whose air holes are arranged in a regular decagonal symmetry structure is expected to be used in the sensing field of a photonic crystal fiber grating.