Wu Qing, Chen Si, Guan Lixin, Wu Haibin
Heilongjiang Province Key Laboratory of Laser Spectroscopy Technology and Application, Harbin University of Science and Technology, Harbin 150080, China.
School of Physics and Electronic Information, Gannan Normal University, Ganzhou 341000, China.
Nanomaterials (Basel). 2022 Feb 24;12(5):766. doi: 10.3390/nano12050766.
A photothermal fiber sensor based on a microfiber knot resonator () and the Vernier effect is proposed and demonstrated. An TiCT nanosheet was deposited onto the ring of an using an optical deposition method to prepare photothermal devices. An and a bare were used as the sensing part and reference part, respectively, of a Vernier-cascade system. The optical and photothermal properties of the bare and the were tested. TiCT was applied to a photothermal fiber sensor for the first time. The experimental results showed that the modulation efficiency of the was 0.02 nm/mW, and based on the Vernier effect, the modulation efficiency of the cascade system was 0.15 nm/mW. The sensitivity was amplified 7.5 times. Our all-fiber photothermal sensor has many advantages such as low cost, small size, and good system compatibility. Our sensor has broad application prospects in many fields. The proposed stable device based on two-dimensional-material modification provides a new solution for improving the sensitivity of optical fiber sensors.
提出并演示了一种基于微光纤结谐振器和 Vernier 效应的光热光纤传感器。采用光学沉积方法将 TiCT 纳米片沉积到微光纤结谐振器的环上以制备光热器件。一个微光纤结谐振器和一个裸微光纤分别用作 Vernier 级联系统的传感部分和参考部分。测试了裸微光纤和微光纤结谐振器的光学和光热特性。首次将 TiCT 应用于光热光纤传感器。实验结果表明，微光纤结谐振器的调制效率为 0.02 nm/mW，基于 Vernier 效应，级联系统的调制效率为 0.15 nm/mW。灵敏度提高了 7.5 倍。我们的全光纤光热传感器具有低成本、小尺寸和良好的系统兼容性等诸多优点。我们的传感器在许多领域具有广阔的应用前景。所提出的基于二维材料改性的稳定光热器件为提高光纤传感器的灵敏度提供了一种新的解决方案。
