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Title: Highly sensitive temperature and humidity sensor based on carbon nanotube-assisted mismatched single-mode fiber structure
Authors: Yuan, W 
Qian, H 
Liu, Y 
Wang, Z 
Yu, C 
Keywords: Carbon nanotube
Fiber sensors
Miniaturized interferometer
Issue Date: 2019
Publisher: Molecular Diversity Preservation International (MDPI)
Source: Micromachines, 2019, v. 10, no. 8, 521 How to cite?
Journal: International journal of environmental research and public health 
Abstract: Here we report on a miniaturized optical interferometer in one fiber based on two mismatched nodes. The all-fiber structure shows stable performance of temperature and humidity sensing. For temperature sensing in large ranges, from 40 to 100 °C, the sensor has a sensitivity of 0.24 dB/°C, and the adjusted R-squared value of fitting result reaches 0.99461 which shows a reliable sensing result. With carbon nanotubes coating the surface of the fiber, the temperature sensitivity is enhanced from 0.24561 to 1.65282 dB/°C in a small region, and the performance of humidity sensing becomes more linear and applicable. The adjusted R-squared value of the linear fitting line for humidity sensing shows a dramatic increase from 0.71731 to 0.92278 after carbon nanotube coating, and the humidity sensitivity presents 0.02571 nm/%RH.
ISSN: 2072-666X
DOI: 10.3390/mi10080521
Rights: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
The following publication Yuan W, Qian H, Liu Y, Wang Z, Yu C. Highly Sensitive Temperature and Humidity Sensor Based on Carbon Nanotube-Assisted Mismatched Single-Mode Fiber Structure. Micromachines. 2019; 10(8):521 is available at
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