一种基于长锥形侧孔光纤光谱探测的折射率传感器。

A Refractive Index Sensor Based on Spectral Interrogation of a Long Tapered Side-Hole Optical Fiber.

作者信息

Kosturek Rafał A, Dudek Michał, Jaroszewicz Leszek R

机构信息

Institute of Applied Physics, Military University of Technology, 2 gen. Sylwestra Kaliskiego St., 00-908 Warsaw, Poland.

出版信息

Sensors (Basel). 2025 Aug 9;25(16):4916. doi: 10.3390/s25164916.

DOI:10.3390/s25164916

PMID:40871780

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12389741/

Abstract

This article describes an external refractive index (RI) sensor based on a spectral analysis of the light transmission through a long tapered side-hole optical fiber (S-H OF). A section of the S-H OF was fusion-spliced with SMFs at both ends and connected to a supercontinuum source at the input and an optical spectrum analyzer (OSA) at the output. To investigate the effect of the external RI on the spectral characteristics, immersion liquids with refractive indices in the ranges of 1.32-1.35 and 1.37-1.42, with increments of 0.01, were used. Power loss measurements were carried out for each liquid in two wavelength ranges: 600-1200 nm and 1200-1800 nm. The highest sensitivity obtained in this study was 622 ± 11 nm/RIU in the near-infrared region. This result highlights the suitability of longtapered S-H OFs for spectral-interrogation-based RI sensing, offering a promising yet simpler alternative to more complex interferometric or plasmonic configurations.

摘要

本文介绍了一种基于对通过长锥形侧孔光纤（S-H OF）的光传输进行光谱分析的外部折射率（RI）传感器。S-H OF的一段在两端与单模光纤（SMF）熔接，并在输入端连接到超连续光源，在输出端连接到光谱分析仪（OSA）。为了研究外部RI对光谱特性的影响，使用了折射率范围为1.32 - 1.35和1.37 - 1.42、增量为0.01的浸没液体。在600 - 1200 nm和1200 - 1800 nm两个波长范围内对每种液体进行了功率损耗测量。本研究中获得的最高灵敏度在近红外区域为622±11 nm/RIU。这一结果突出了长锥形S-H OF在基于光谱询问的RI传感方面的适用性，为更复杂的干涉或等离子体配置提供了一种有前景但更简单的替代方案。