基于光子晶体光纤的光学传感

Optical Sensing Based on Photonic Crystal Fibers

光子晶体光纤(PCFs)的应用在很多方面改善了传统光纤传感器的性能。基于PCFs的光纤传感器对应力和液体折射率具有较高的传感精度以及更好的温度特性,并且可以灵活引入各种耦合结构单元组成干涉仪,介绍了基于光纤布拉格光栅(FBG)、长周期光栅(LPG)和干涉仪的PCFs传感器的基本构造、工作原理和最新的研究进展。

Application of photonic crystal fibers （PCFs） leads to extensive improvement in the performance of traditional fiber sensors. Fiber sensors based on PCFs exhibit higher accuracy and temperature characteristics towards sensing strain as well as the refractive index of liquids, and are capable of incorporating different types of coupling structure units that comprise interferometer. Basic structures, operating principles and recent research progresses of photonic crystal fibers sensor based on Bragg grating, long-period grating （LPG） and interferometer are reviewed.