Zhao Shuangxiang, Liu Qingwen, He Zuyuan
Opt Lett. 2020 Sep 15;45(18):5217-5220. doi: 10.1364/OL.400560.
Recently, laser-driven resonant fiber-optic sensors (FOSs) have been reported to reach the ultimate resolution limit, set by the thermal noise in fiber. However, they are still far away from commercialization because of their dependence on expensive and ultra-narrow-linewidth lasers. In this Letter, a white-light-driven resonant FOS is proposed for the first time, to the best of our knowledge. By using the white-light multi-beam interferometry, the resonant peaks of a fiber Fabry-Perot interferometer sensor are obtained, and the resonance drifts are tracked for sensor readout by using the Pound-Drever-Hall technique. The proposed FOS is adopted for strain measurement, and the achieved strain resolution (0.9ε/√ at 100 Hz) is comparable with that of laser-driven FOSs.
最近，据报道激光驱动的共振光纤传感器（FOS）已达到由光纤热噪声设定的极限分辨率。然而，由于它们依赖于昂贵且超窄线宽的激光器，它们仍远未实现商业化。据我们所知，在本信函中首次提出了一种白光驱动的共振FOS。通过使用白光多光束干涉测量法，获得了光纤法布里 - 珀罗干涉仪传感器的共振峰，并使用庞德 - 德瑞弗 - 霍尔技术跟踪共振漂移以进行传感器读出。所提出的FOS用于应变测量，所实现的应变分辨率（在100 Hz时为0.9ε/√）与激光驱动的FOS相当。
