Optical fiber sensors with Fabry-Perot thin film coating as sensitive element

Minghong Yang; Xiaobing Li; Junjie Wang; Xinglin Tong

doi:10.1117/12.867952

8 October 2010 Optical fiber sensors with Fabry-Perot thin film coating as sensitive element

Minghong Yang, Xiaobing Li, Junjie Wang, Xinglin Tong

Proceedings Volume 7659, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Smart Structures and Materials in Manufacturing and Testing; 765908 (2010) https://doi.org/10.1117/12.867952
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

A fiber-optic relative-humidity sensor composed of two silver coating and a polymer film is proposed and developed. Ag coatings are magnetically sputtered, and sandwiched by a dip-coated moisture-sensitive polyvinyl alcohol (PVA) film, which constructs a low-fineness Fabry-Perot sensing head. Experimental results show that interference fringe shifts to longer wavelength when relative humidity increases. The interference fringe shifts of two-layer sensor and three-layer sensor are 5.3 nm and 1.9 nm respectively. The linearity of interference fringe shift to relative humidity is averagely 0.9874.

Citation Download Citation

Minghong Yang, Xiaobing Li, Junjie Wang, and Xinglin Tong "Optical fiber sensors with Fabry-Perot thin film coating as sensitive element", Proc. SPIE 7659, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Smart Structures and Materials in Manufacturing and Testing, 765908 (8 October 2010); https://doi.org/10.1117/12.867952

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