A Study on Evanescent Wave Humidity Sensor Based on PEG-PMMA Microspheres With Enhanced Performance
In this study, we demonstrate fabrication of an evanescent wave fiber optic humidity sensor based on PEG-PMMA microsphere film as moisture-sensitive material. A three dimensional stacking structure of PEG-PMMA microspheres is formed by dip coating method on fiber core. A simultaneous fast response and recovery is optimized with equilibrium time of 13 s and 8 s between 30%RH and 80%RH, respectively. The sensor possessed a maximum sensitivity of 157.143 lux/%RH in the range of 70-80%RH and a good linear relationship between the logarithm of output optical intensity and relative humidity with a correlation coefficient of 0.998. Moreover, the sensor exhibits low hysteresis, excellent repeatability, short-term and long-term stability and electromagnetic immunity. Modulation of intensity is primarily attributed to scattering of evanescent wave on polymer microspheres in humidity sensing.
Authors
- Bo Liu (ORCID: https://orcid.org/0000-0002-9603-9975)
- Yuxin Chen (ORCID: https://orcid.org/0000-0002-8060-7624)
- Jun Qian (ORCID: https://orcid.org/0000-0002-3242-6706)
- Min Lai (ORCID: https://orcid.org/0000-0001-8489-2736)
- Bao Zhu (ORCID: https://orcid.org/0000-0002-7628-5298)
- Zhongwei Gu (ORCID: https://orcid.org/0000-0003-1547-6880)
- Chao He (ORCID: https://orcid.org/0000-0002-6467-6320)
- Yan Ma
- Xingchen Zhou (ORCID: https://orcid.org/0000-0002-5700-2942)
- Xuefei Xiao
- Yutong Qi
Institutions
- Nanjing University of Information Science and Technology (CN)
Publication Details
- Journal
- IEEE photonics journal
- Published
- 2025-05-19
- DOI
- https://doi.org/10.1109/jphot.2025.3571489
- Citations
- 1
- Primary Topic
- Advanced Fiber Optic Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.73
Funders
- National Natural Science Foundation of China