Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 335, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2022.113370
Keywords
Optical fiber sensor; Electrospinning; Peanut-shaped structure; Temperature sensing; Humidity sensing
Funding
- National Key Research and Development Program of China [2019YFB2204400]
- Key Research and Development Program in Shaanxi Province [2021GY-296]
- Open Projects Foundation of Yangtze Optical Fiber and Cable Joint Stock Limited Company (YOFC) [SKLD1907]
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A peanut-shaped optical fiber sensor cascaded with a fiber Bragg grating (FBG) was designed to measure temperature and humidity. The sensor utilized a nanofiber film to detect humidity changes and measured temperature changes through the shift in the center wavelength of the FBG.
A peanut-shaped optical fiber sensor cascaded with a fiber Bragg grating (FBG) was designed to measure temperature and humidity. A mixed polyvinyl alcohol/nano-zinc oxide (PVA/nano-ZnO) solution was electrospinning into nanofibers, and these nanofibers were then attached to the peanut-shaped structure surface to form a nanofiber film. Humidity changes caused changes in both the refractive index and the thickness of the PVA/nano-ZnO composite nanofiber film that subsequently caused changes in the transmitted light loss. Temperature changes caused a shift in the center wavelength of the FBG. Experimental results showed that the humidity and temperature sensitivities of the proposed sensor coated with the PVA/ nano-ZnO composite film were -0.02539 dB/%RH and 11.14 pm/celcius, respectively. Compared with an optical fiber sensor using a PVA film alone, the humidity sensitivity of the proposed sensor was increased by nearly four times after the addition of nano-ZnO.(c) 2022 Elsevier B.V. All rights reserved.
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