Acknowledgement
This study was supported by the National Natural Science Foundation of China (No. 61805285), the Graduate Innovation Engineering Project (YCX2020118), and the National Training Program of Innovation and Entrepreneurship for Undergraduates (Nos. 202012047).
References
- S. A. Kolpakov, N. T. Gordon, C. Mou, and K. Zhou, "Toward a new generation of photonic humidity sensors," Sensors 14, 3986-4013 (2014). https://doi.org/10.3390/s140303986
- F. U. Hernandez, S. P. Morgan, B. R. Hayes-Gill, D. Harvey, W. Kinnear, A. Norris, D. Evans, J. G. Hardman, and S. Korposh, "Characterization and use of a fiber optic sensor based on PAH/SiO2 film for humidity sensing in ventilator care equipment," IEEE Trans. Biomed. Eng. 63, 1985-1992 (2016). https://doi.org/10.1109/TBME.2016.2521662
- H. J. Kim, H. Y. Shin, C. H. Pyeon, S. Kim, and B. Lee, "Fiber-optic humidity sensor system for the monitoring and detection of coolant leakage in nuclear power plants," Nucl. Eng. Technol. 52, 1689-1696 (2020). https://doi.org/10.1016/j.net.2020.01.027
- G. Berruti, M. Consales, M. Giordano, L. Sansone, P. Petagna, S. Buontempo, G. Breglio, and A. Cusano, "Radiation hard humidity sensors for high energy physics applications using polyimide-coated fiber Bragg gratings sensors," Sens. Actuators B Chem. 177, 94-102 (2013). https://doi.org/10.1016/j.snb.2012.10.047
- Y. Zhao, R. J. Tong, M. Q. Chen, and F. Xia, "Relative humidity sensor based on hollow core fiber filled with GQDs-PVA," Sens. Actuators B Chem. 284, 96-102 (2019). https://doi.org/10.1016/j.snb.2018.12.130
- C. Bian, M. Hu, R. Wang, T. Gang, R. Tong, L. Zhang, T. Guo, X. Liu, and X. Qiao, "Optical fiber humidity sensor based on the direct response of the polyimide film," Appl. Opt. 57, 356-361 (2018). https://doi.org/10.1364/AO.57.000356
- J. Li, J. Zhang, H. Sun, Y. Yang, and Y. Xie, "An optical fiber sensor based on carboxymethyl cellulose/carbon nanotubes composite film for simultaneous measurement of relative humidity and temperature," Opt. Commun. 467, 125740-125747 (2020). https://doi.org/10.1016/j.optcom.2020.125740
- X. Liu, M. Jiang, Q. Sui, and X. Geng, "Optical fibre Fabry-Perot relative humidity sensor based on HCPCF and chitosan film," J. Mod. Opt. 63, 1668-1674 (2016). https://doi.org/10.1080/09500340.2016.1167974
- A. L. Aldaba, D. Lopez-Torres, C. Elosua, J.-L. Auguste, R. Jamier, P. Roy, F. J. Arregui, and M. Lopez-Amo,"SnO2-MOF-Fabry-Perot optical sensor for relative humidity measurements," Sens. Actuators B Chem. 257, 189-199 (2018). https://doi.org/10.1016/j.snb.2017.10.149
- A. M. Shrivastav, D. S. Gunawardena, Z. Y. Liu, and H.-Y. Tam, "Microstructured optical fiber based Fabry-Perot interferometer as a humidity sensor utilizing chitosan polymeric matrix for breath monitoring," Sci. Rep. 10, 6002 (2020). https://doi.org/10.1038/s41598-020-62887-y
- C. Li, X. Yu, W. Zhou, Y. Cui, J. Liu, and S. Fan, "Ultrafast miniature fiber-tip Fabry-Perot humidity sensor with thin graphene oxide diaphragm," Opt. Lett. 43, 4719-4722 (2018). https://doi.org/10.1364/OL.43.004719
- P. Sun, M. Wang, L. Liu, L. Jiao, W. Du, F. Xia, M. Liu, W. Kong, L. Dong, and M. Yun, "Sensitivity enhancement of surface plasmon resonance biosensor based on graphene and barium titanate layers," Appl. Surf. Sci. 475, 342-347 (2019). https://doi.org/10.1016/j.apsusc.2018.12.283
- H. Feng, Z. Xu, K. Li, M. Wang, W. Xie, Q. Luo, B. Chen, W. Kong, and M. Yun, "Tunable polarization-independent and angle-insensitive broadband terahertz absorber with graphene metamaterials," Opt. Express 29, 7158-7167 (2021). https://doi.org/10.1364/OE.418865
- H. Feng, X. Li, M. Wang, F. Xia, K. Zhang, W. Kong, L. Dong, and M. Yun, "Ultrabroadband metamaterial absorbers from ultraviolet to near-infrared based on multiple resonances for harvesting solar energy," Opt. Express 29, 6000-6010 (2021). https://doi.org/10.1364/OE.419269
- D. Su, X. Qiao, Q. Rong, H. Sun, J. Zhang, Z. Bai, Y. Du, D. Feng, Y. Wang, M. Hu, and Z. Feng, "A fiber Fabry-Perot interferometer based on a PVA coating for humidity measurement," Opt. Commun. 311, 107-110 (2013). https://doi.org/10.1016/j.optcom.2013.08.016
- M.-Q. Chen, Y. Zhao, H.-M. Wei, C.-L. Zhu, and S. Krishnaswamy, "3D printed castle style Fabry-Perot microcavity on optical fiber tip as a highly sensitive humidity sensor," Sens. Actuators B Chem. 328, 128981 (2021). https://doi.org/10.1016/j.snb.2020.128981
- Y. Zhao, Y. Yuan, W. Gan, and M. Yang, "Optical fiber Fabry- Perot humidity sensor based on polyimide membrane: sensitivity and adsorption kinetics," Sens. Actuators A Phys. 281, 48-54 (2018). https://doi.org/10.1016/j.sna.2018.08.044
- B. Wang, J. Tian, L. Hu, and Y. Yao, "High sensitivity humidity fiber-optic sensor based on all-agar Fabry-Perot interferometer," IEEE Sens. J. 18, 4879-4885 (2018). https://doi.org/10.1109/jsen.2018.2828134
- J. S. Santos, I. M. Raimundo Jr, C. M. B. Cordeiro, C. R. Biazoli, C. A. J. Gouveia, and P. A. S. Jorge, "Characterisation of a Nafion film by optical fibre Fabry-Perot interferometry for humidity sensing," Sens. Actuators B Chem. 196, 99-105 (2014). https://doi.org/10.1016/j.snb.2014.01.101
- S. Liu, Y. Ji, J. Yang, W. Sun, and H. Li,, "Nafion film temperature/humidity sensing based on optical fiber Fabry-Perot interference," Sens. Actuators A Phys. 269, 313-321 (2018). https://doi.org/10.1016/j.sna.2017.11.034
- C. Li, X. Yu, T. Lan, J. Liu, and S. Fan, "Insensitivity to humidity in Fabry-Perot sensor with multilayer graphene diaphragm," IEEE Photonics Technol. Lett. 30, 565-568 (2018). https://doi.org/10.1109/lpt.2018.2805382
- N. Wang, W. Tian, H. Zhang, X. Yu, X. Yin, Y. Du, and D. Li, "An easily fabricated high performance Fabry-Perot optical fiber humidity sensor filled with graphene quantum dots," Sensors 21, 806 (2021). https://doi.org/10.3390/s21030806
- C. Huang, W. Xie, M. Yang, J. Dai, and Z. Bo, "Optical fiber Fabry-Perot humidity sensor based on porous Al2O3 film," IEEE Photonics Technol. Lett. 27, 2127-2130 (2015). https://doi.org/10.1109/LPT.2015.2454271
- A. Vaz, N. Barroca, M. Ribeiro, A. Pereira, and O. Frazao, "Optical fiber humidity sensor based on polyvinylidene fluoride Fabry-Perot," IEEE Photonics Technol. Lett. 31, 549-552 (2019). https://doi.org/10.1109/lpt.2019.2901571
- X. Wei, W. B. Huang, X. G. Huang, and C. Y. Yu, "A simple fiber-optic humidity sensor based on extrinsic Fabry-Perot cavity constructed by cellulose acetate butyrate film," Opt. Fiber Technol. 19, 583-586 (2013). https://doi.org/10.1016/j.yofte.2013.09.005
- M. Yang, W. Xie, Y. Dai, D. Lee, J. Dai, Y. Zhang, and Z. Zhuang, "Dielectric multilayer-based fiber optic sensor enabling simultaneous measurement of humidity and temperature," Opt. Express 22, 11892-11899 (2014). https://doi.org/10.1364/OE.22.011892
- C. Huang, W. Xie, D. Lee, C. Qi, M. Yang, M. Wang, and J. Tang, "Optical fiber humidity sensor with porous TiO2/SiO2/TiO2 coatings on fiber tip," IEEE Photonics Technol. Lett. 27, 1495-1498 (2015). https://doi.org/10.1109/LPT.2015.2426726
- Q. Sui, M. Jiang, Z. Jin, F. Zhang, Y. Cao, and L. Jia, "Optical fiber relative humidity sensor based on Fabry-Perot interferometer coated with sodium-p-styrenesulfonate/allylamine hydrochloride films," Sens. Mater. 26, 291-298 (2014).
- Y. Miao, B. Liu, H. Zhang, Y. Li, H. Zhou, H. Sun, W. Zhang, and Q. Zhao, "Relative humidity sensor based on tilted fiber Bragg grating with polyvinyl alcohol coating," IEEE Photonics Technol. Lett. 21, 441-443 (2009). https://doi.org/10.1109/LPT.2009.2013185
- J. Mathew, Y. Semenova, and G. Farrell, "Effect of coating length on the sensitivity of a humidity sensor based on an Agarose coated photonic crystal fiber interferometer," Opt. Express 21, 6313-6320 (2013). https://doi.org/10.1364/OE.21.006313
- C. A. Murray and J. R. Dutcher, "Effect of changes in relative humidity and temperature on ultrathin chitosan films," Bio-macromolecules 7, 3460-3465 (2006).
- Y.-P. Miao, B. Liu, J. Liu, H. Sun, and Q.-D. Zhao, "Relative humidity sensor based on tilted fiber grating, " J. Optoelectron. Laser 21, 978-982 (2010).