期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 27, 期 20, 页码 2127-2130出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2015.2454271
关键词
Fabry-Perot interferometer; optical fiber sensors; relative-humidity; porous anodic alumina film
资金
- National Natural Science Foundation of Hubei Provincial Government [2014CFB260]
- National Science Foundation of China [61475121]
An optical fiber humidity sensor with porous anodic alumina (PAA) film on single-mode fiber tip is proposed and experimentally demonstrated. Relative-humidity (RH) sensing is correlated with the shift of interference fringe due to capillary condensation, which results in the change of effective refractive index of PAA film when exposed to different RH environments. Experimental result shows that sensitivity of 0.31 nm/% RH can be realized with very good repeatability in range of 20% RH-90% RH. It can be concluded that fiber-optic RH sensors with PAA film of thinner thickness, smaller aperture size, and aspect ratio would present promising sensing performance.
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