Highly sensitive temperature and humidity sensor based on carbon nanotube-assisted mismatched single-mode fiber structure

Weihao Yuan, Hao Qian, Yi Liu, Zhuo Wang, Changyuan Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)


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.

Original languageEnglish
Article number521
Issue number8
Publication statusPublished - 1 Aug 2019


  • Carbon nanotube
  • Fiber sensors
  • Humidity
  • Miniaturized interferometer
  • Temperature

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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