期刊
IEEE ACCESS
卷 7, 期 -, 页码 120297-120303出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2019.2933561
关键词
Fiber-optic; Fabry-Perot interferometer; ultrasensitive; transverse load; Vernier-effect
资金
- National Natural Science Foundation of China (NSFC) [61835005, 61822507, 61522501, 61475024, 61675004, 61705107, 61727817, 61775098, 61720106015, 61875248]
- National Key Research and Development Program of China [2018YFB1800901, 2018YFB1800905, 2018YFB1801004, 2018YFB1801302, 2018YFB1801703]
- National High Technology 863 Program of China [2015AA015501, 2015AA015502]
- Beijing Young Talent [2016000026833ZK15]
- Fund of State Key Laboratory of IPOC (BUPT)
- Startup Foundation for Introducing Talent of NUIST [2241131801051, 2241131801052]
The parallel structured fiber-optic Fabry-Perot interferometer (FPI) is theoretically proposed and experimentally demonstrated for transverse load measurement based on Vernier-effect. This kind of sensor consists of a hollow microsphere cavity fiber-optic FPI for sensing function and an air cavity for reference, both of which are parallel connected by a 3 dB optical fiber coupler with the functionality of Vernier-effect. Experimental results indicate that the proposed sensor can provide a high transverse load sensitivity of -3.75 nm/N, which is 3.4 times higher than single hollow microsphere cavity FPI. Moreover, with the excellent features of low cost, easy fabrication, and stable sensing, the parallel structured FPIs proposed will provide a new vision for high sensitivity transverse load sensing.
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