Optical fiber sensing technologies play an important role in the optimization of chemical material production processes and curing monitoring in new materials development. A novel fiber-integrated Fabry–Perot interferometer sensor is proposed and demonstrated in this work. For the first time to our knowledge, this development realizes the real-time monitoring of UV curing. The sensor was composed of a wedge-shaped capillary optical fiber sandwiched between two standard SMFs. Owing to a small volume (<0.4 nL) of opening FP cavity, only one drop of UV glue sample needs to fill the cavity. Experimental results show that the sensor demonstrates good linearity and high refractive index sensitivity of 1162.5 nm/RIU. The sensor can be fabricated with simple processes and its fast response speed, high precision, good stability, and good repeatability enhances its usefulness in applications such as monitoring structural change, biological or chemical reaction.

光纤传感技术在化学材料生产过程的优化和新材料开发中的固化监测方面发挥着重要作用。在这项工作中提出并演示了一种新型光纤集成法布里-珀罗干涉仪传感器。据我们所知，这一开发成果首次实现了对紫外线固化的实时监控。该传感器由夹在两个标准 SMF 之间的楔形毛细光纤组成。由于开口FP腔的体积很小（<0.4 nL），只需一滴UV胶样品即可填充腔。实验结果表明，该传感器具有良好的线性度和高折射率灵敏度，为 1162.5 nm/RIU。该传感器制作工艺简单，响应速度快，精度高，稳定性好，