Cao Rongtao, Yang Yang, Wang Mohan, Yi Xinruo, Wu Jingyu, Huang Sheng, Chen Kevin P
Opt Lett. 2020 Jun 1;45(11):3163-3166. doi: 10.1364/OL.389433.
This Letter presents an approach to produce multiplexable optical fiber chemical sensor using an intrinsic Fabry-Perot interferometer (IFPI) array via the femtosecond laser direct writing technique. Using the hydrogen-sensitive palladium (Pd) alloy as a functional sensory material, Pd alloy coated IFPI devices can reproducibly and reversibly measure hydrogen concentrations with a detection limit of 0.25% at room temperature. Seven IFPI sensors were fabricated in one fiber and performed simultaneous temperature and hydrogen measurements at seven different locations. This Letter demonstrates a simple yet effective approach to fabricate multiplexable fiber optical chemical sensors for use in harsh environments.
本文提出了一种通过飞秒激光直写技术，利用本征法布里-珀罗干涉仪（IFPI）阵列制备可复用光纤化学传感器的方法。使用对氢敏感的钯（Pd）合金作为功能传感材料，涂覆有Pd合金的IFPI器件能够在室温下以0.25%的检测限可重复且可逆地测量氢浓度。在一根光纤中制备了七个IFPI传感器，并在七个不同位置同时进行温度和氢测量。本文展示了一种简单而有效的方法，用于制造可在恶劣环境中使用的可复用光纤化学传感器。
