Sensitivity-enhanced humidity sensor based on a surface core fiber decorated with graphene oxide

IF 6.5 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Sensors and Actuators Reports Pub Date : 2024-06-02 DOI:10.1016/j.snr.2024.100207

Rang Chu , Yanzhen Tan , Fei Zhou , Ye Liu

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Abstract

An all-optical fiber humidity sensor based on a Mach-Zehnder interferometer (MZI) covered with graphene oxide (GO) film is demonstrated. The MZI is formed by inserting a section of etched surface core fiber (SCF) between two standard single mode fibers (SMFs) with a lateral-offset. Such configuration of the interferometer allows a strong evanescent field between the water molecules and the GO layer and hence enhances the change in refractive index of GO nanostructures after water absorption, which significantly improves the humidity sensitivity. Experimental results showed that the fabricated sensor exhibited a super-high humidity sensitivity of 707.3pm/%RH in the RH range of 40–80% and a rapid response/recovery time (4.8/8.4 s). The high-performance of the proposed all fiber humidity sensor is potentially promising for industrial production, medical diagnoses, environmental and health monitoring.

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基于氧化石墨烯装饰的表芯纤维的灵敏度增强型湿度传感器

展示了一种基于覆盖有氧化石墨烯（GO）薄膜的马赫-泽恩德干涉仪（MZI）的全光光纤湿度传感器。MZI 是通过在两根标准单模光纤（SMF）之间插入一段具有横向偏移的蚀刻面芯光纤（SCF）而形成的。这种干涉仪的配置可在水分子和 GO 层之间形成强大的蒸发场，从而增强 GO 纳米结构吸水后折射率的变化，显著提高湿度灵敏度。实验结果表明，所制造的传感器在相对湿度为 40-80% 的范围内具有 707.3pm/%RH 的超高湿度灵敏度和快速响应/恢复时间（4.8/8.4 秒）。这种高性能的全纤维湿度传感器有望用于工业生产、医疗诊断、环境和健康监测。

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来源期刊

Sensors and Actuators Reports Multiple-

CiteScore

9.60

自引率

0.00%

发文量

审稿时长

49 days

期刊介绍： Sensors and Actuators Reports is a peer-reviewed open access journal launched out from the Sensors and Actuators journal family. Sensors and Actuators Reports is dedicated to publishing new and original works in the field of all type of sensors and actuators, including bio-, chemical-, physical-, and nano- sensors and actuators, which demonstrates significant progress beyond the current state of the art. The journal regularly publishes original research papers, reviews, and short communications. For research papers and short communications, the journal aims to publish the new and original work supported by experimental results and as such purely theoretical works are not accepted.