本文综述了空芯光子带隙光纤的独特性质，并介绍了近年来这类光纤在传感领域应用的新进展。光波在空气纤芯中低损耗传输是空芯光子带隙光纤的重要特性，它带来了长距离、大能量密度的光与物质相互作用通道，降低了光纤材料属性对传输光的影响(如中红外吸收、热光效应)，为诸如痕量气体/液体探测、高精度光纤陀螺仪等传感应用提供了高效的新平台。空芯光子带隙光纤内部精细的微结构具有新颖的机械性能和热性能，有利于诸如声波、振动探测等传感应用；还可结合光纤后期热处理、选择性填充等技术，对多孔包层进行结构修改或材料填充，获得进一步的性能和功能扩展。这些灵活性已用于开发具有新特性的光纤器件，例如光栅、起偏器和偏振干涉仪。目前，空芯光子带隙光纤传感技术的发展已大大扩展了光纤的环境感知能力和应用范围，是全光器件和光集成技术发展的重要方向。

In this paper, the unique properties of the hollow-core photonic bandgap fiber (HC-PBF) are reviewed, and a variety of sensing and device applications of this type of fiber in recent years are introduced. Low-loss light transmission in air core is an important characteristic of the HC-PBF, which provides light-matter interaction channel with high energy density and long interaction distance. In addition, the air-propagation of the light in fiber also reduces the impacts of fiber material properties (such as infrared absorption, thermos-optical effect) on propagating light, hence offers an efficient platform for the sensing applications such as trace gas / liquid detection, optical fiber gyro sensing. The fine micro-structure in HC-PBF exhibits novel mechanical and thermal properties, which would be beneficial to the sensing applications such as sound wave and vibration detection. The HC-PBF’s porous structure can also be locally modified by using various post-processing techniques, such as local heat treatment, micromachining and selective filling, which would enable further function extension or performance enhancement. The flexibility of the fiber has been used to develop new optical fiber devices, such as grating, polarizer and polarization interferometer. At present, the development of HC-PBF sensing technology has greatly expanded the sensing ability and application range of optical fiber. It is an important direction for the development of all-optical devices and optical integration technology.