Dual parameter fiber optic sensor combining a Fabry-Perot and a Mach-Zehnder interferometer

被引:0
|
作者
Hammarling, K. [1 ]
Engholm, M. [1 ]
Muri, H., I [2 ]
Wahl, M. [2 ]
Hjelme, D. R. [2 ]
机构
[1] Mid Sweden Univ, Dept Elect, Sundsvall, Sweden
[2] Norwegian Univ Sci & Technol NTNU, Dept Elect Syst, Trondheim, Norway
来源
关键词
dual optical sensor; Fabry-Perot; Mach-Zehnder; interferometer;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A new concept for dual parameter fiber optic sensor has been developed and characterized, both in a two-fiber and single-fiber configuration. The liquid sensor measures ethanol concentration with a stimuli responsive hydrogel which constitutes a low finesse Fabry-Perot cavity, and refractive index with a Mach-Zehnder type fiber optic interferometer. The two-fiber configuration utilize a fiber optic 1310/1550 nm wavelength division multiplexer to separate the two parameters, while a versatile filtering algorithm extracts and separates the two parameters in the single-fiber configuration. No cross talk were observed for the measured parameters of free spectral range and refractive index for the two-fiber configurations, while for the single fiber configuration cross-talk were observed. The two configurations prove to be versatile dual parametric fiber optic sensor concepts for accurate detection of specific parameters, based on stimuli responsive hydrogels.
引用
收藏
页码:1440 / 1442
页数:3
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