基于锥形单模-无芯-单模光纤结构的高灵敏度折射计。

High Sensitivity Refractometer Based on a Tapered-Single Mode-No Core-Single Mode Fiber Structure.

机构信息

Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China.

Centre for Composite Materials and Structures, Key Laboratory of Science and Technology for National Defence, Harbin Institute of Technology (HIT), Harbin 150080, China.

出版信息

Sensors (Basel). 2019 Apr 10;19(7):1722. doi: 10.3390/s19071722.

DOI:10.3390/s19071722

PMID:30974912

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6479475/

Abstract

We have proposed a novel tapered-single mode-no core-single mode (TSNS) fiber refractometer based on multimode interference. The TSNS structure exhibits a high contrast ratio (＞15 dB) and a uniform interference fringe. The influence of different lengths and diameters of the TSNS on the refractive index unit (RIU) sensitivity was investigated. The experimental investigations indicated a maximum sensitivity of 1517.28 nm/RIU for a refractive index of 1.417 and low-temperature sensitivity (＜10 pm/ºC). The experimental and simulation results are also in good agreement.

摘要

我们提出了一种基于多模干涉的新型锥形单模-无芯单模（TSNS）光纤折射率传感器。TSNS 结构具有高对比度（＞15dB）和均匀的干涉条纹。研究了不同长度和直径的 TSNS 对折射率单位（RIU）灵敏度的影响。实验研究表明，在折射率为 1.417 时，最大灵敏度为 1517.28nm/RIU，低温灵敏度（＜10pm/ºC）。实验和模拟结果也吻合较好。