D-shape optical fiber pH sensor based on Lossy Mode Resonances (LMRs)

被引：0
|
作者：
Zubiate, P. [1 ]
Zamarreno, C. R. [1 ]
Del Villar, I. [1 ]
Matias, I. R. [1 ]
Arregui, F. J. [1 ]
机构：
[1] Univ Publ Navarra, Dept Elect & Elect Engn, Pamplona, Navarra, Spain
来源：
2015 IEEE SENSORS | 2015年
关键词：
Optical fiber; LMR; D-shaped; thin films; PAH/PAA; pH;
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：
The fabrication and characterization of an optical fiber pH sensor based on Lossy Mode Resonances (LMRs) is presented. PAH/PAA polymeric thin-films fabricated onto side-polished D-shaped optical fibers are used as LMR supporting coatings. The thickness of PAH/PAA coatings can be modified as a function of the external medium pH. As a consequence of this variation, the effective refractive index of the structure will change, producing a shift of the LMR. The fabricated sensor has been used to measure pH from 4.0 to 5.0. This pH sensor showed a sensitivity of 101.3 nm per pH unit, which means a resolution of similar to 6x10-4 pH units by using a conventional communications Optical Spectrum Analyzer (OSA), which is an improvement over commercial pH sensors.
引用
收藏
页码：964 / 967
页数：4
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