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光纤气体传感器具有灵敏度高、防磁、防爆、远程控制等优点。而将空芯带隙型光子晶体光纤应用于气体传感,将使得气体传感与检测的灵敏度进一步提高。文章针对一氧化碳气体的特性及传感器对带隙型光子晶体光纤性能的要求,利用平面波展开法和矢量有限元法,通过分析计算,得出所需的光纤的基本参数,即纤芯的半径、空气孔的半径和间距,使其在纤芯中的传输率达到90%以上,其应用可以使传感器的检测灵敏度得以提高。
Optical fiber gas sensor with high sensitivity, anti-magnetic, explosion-proof, remote control and so on. The hollow core bandgap photonic crystal fiber used in gas sensing, gas sensing and detection will enable the further increase in sensitivity. Aiming at the characteristics of carbon monoxide gas and the requirements of sensor for the performance of band gap photonic crystal fiber, the fundamental parameters of the required fiber are obtained by using plane wave expansion method and vector finite element method. The radius, air The radius and spacing of the holes make it more than 90% of the transmission in the fiber core, and its application can improve the detection sensitivity of the sensor.