基于单模异质芯光纤结构的湿度传感器。

Humidity sensor based on a single-mode hetero-core fiber structure.

机构信息

Photonics Research Center, School of Electronic and Communications Engineering, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland.

出版信息

Opt Lett. 2011 May 15;36(10):1752-4. doi: 10.1364/OL.36.001752.

DOI:10.1364/OL.36.001752

PMID:21593879

Abstract

Using a small-core single-mode fiber (SCSMF), a novel relative humidity (RH) sensor based on an SMF28-SCSMF-SMF28 fiber structure was proposed in this paper. By depositing a humidity sensitive material, such as poly (ethylene oxide) (PEO) on the bare SCSMF fiber, the proposed structure can act as an RH sensor with high sensitivity. Experiments demonstrated that the proposed RH sensor with PEO coating can achieve a sensitivity of 430 nm per relative humidity unit (RHU) in the RH range from 80% to 83% RH and a sensitivity of 50 nm per RHU in the RH range from 83% to 95% RH.

摘要

本文提出了一种基于 SMF28-小芯单模光纤（SCSMF）-SMF28 光纤结构的新型相对湿度（RH）传感器，该传感器使用小芯单模光纤（SCSMF）。通过在裸露的 SCSMF 光纤上沉积湿度敏感材料，如聚氧化乙烯（PEO），该结构可以作为具有高灵敏度的 RH 传感器。实验表明，具有 PEO 涂层的所提出的 RH 传感器在 80%至 83% RH 的 RH 范围内可以实现每相对湿度单位（RHU）430nm 的灵敏度，在 83%至 95% RH 的 RH 范围内可以实现每 RHU 50nm 的灵敏度。