基于有损模式谐振的高灵敏度光纤折射率传感器的理论与实验研究,Journal of the Optical Society of America B

当前位置： X-MOL 学术 › J. Opt. Soc. Amer. B › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

基于有损模式谐振的高灵敏度光纤折射率传感器的理论与实验研究
Journal of the Optical Society of America B ( IF 1.8 ) Pub Date : 2019-07-16 , DOI: 10.1364/josab.36.002069
Wan-Ming Zhao , Qi Wang , Xue-Zhou Wang , Xiang Li , Jian-Ying Jing , Hong-Zhi Sun

采用逐层方法在去包层多模光纤的纤芯上涂覆TiO2/PSS纳米薄膜，实现了基于有损模式谐振（LMR）的高灵敏度折射率传感器。首次利用有限元方法基于模式耦合理论分析了纳米薄膜厚度、共振阶数和周围折射率对模式消光系数、灵敏度和非线性的影响，据我们所知。在中红外波段 1.383–1.403 的 RI 范围内，灵敏度理论上可以达到 63,823 nm/RIU 以上。此外，实验中获得了在可见光波段 1.355-1.375 RI 范围内灵敏度高达 6,754 nm/RIU 的传感器，在 TiO2 涂层 LMR 基传感器中灵敏度最高。此外，结合有限元和传递矩阵的方法探讨了基于LMR的多模光纤传感器光谱展宽的原因，证明了光谱展宽是由于不同模式的共振波长的差异造成的。窄谱是为了减少光纤波导中的传输模式。本文在系统分析后指出了基于LMR的光纤传感器的设计规律，为今后的研究提供指导。

"点击查看英文标题和摘要"

Theoretical and experimental research of lossy mode resonance-based high-sensitivity optical fiber refractive index sensors

A high-sensitivity refractive index sensor based on lossy mode resonance (LMR) was achieved by coating TiO2/PSS nanofilm on the core of cladding-removed multimode fiber using a layer-by-layer method. The influence of nanofilm thickness, resonance orders, and surrounding refractive index on mode extinction coefficients, sensitivity, and nonlinearity was analyzed based on mode-coupling theory using the finite element method for the first time, to the best of our knowledge. The sensitivity can theoretically reach more than 63,823 nm/RIU in the RI range of 1.383–1.403 in the midinfrared band. In addition, the sensor with sensitivity up to 6,754 nm/RIU in the RI range of 1.355–1.375 in the visible band was obtained in the experiment, which is highest among TiO2-coated LMR-based sensors. In addition, the reason for spectrum broadening in LMR-based multimode fiber sensors was also explored with a combination of finite element and transfer matrix methods, which proved that the spectrum broadening is due to the difference of the resonance wavelength of different modes, and the key rule to narrow the spectrum is to reduce the transmission modes in a fiber waveguide. This paper pointed out the design rules of LMR-based optical fiber sensors after systematical analyzation, which provides guidance for future research.

更新日期：2019-07-16

点击分享查看原文

点击收藏

阅读更多本刊新发论文