期刊
OPTICS EXPRESS
卷 27, 期 12, 页码 17239-17250出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.27.017239
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资金
- National Natural Science Foundation of China (NSFC) [61835005, 61822507, 61522501, 61475024, 61675004, 61705107, 61727817, 61775098, 61720106015, 61875248]
- Program 863 [2015AA015501, 2015AA015502]
- State Key Laboratory of IPOC (BUPT)
- Beijing Young Talent [2016000026833ZK15]
A novel parallel structured fiber-optic Fabry-Perot interferometer (FPI) based on Vemier-effect is theoretically proposed and experimentally demonstrated for ultrasensitive strain measurement. This proposed sensor consists of open-cavity and closed-cavity fiber-optic FPI, both of which are connected in parallel via a 3 dB coupler. The open-cavity is implemented for sensing, while the closed-cavity for reference. Experimental results show that the proposed parallel structured fiber-optic FPI can provide an ultra-high strain sensitivity of -43.2 pm/mu epsilon, which is 4.6 times higher than that of a single open-cavity FPI. Furthermore, the sensor is simple in fabrication, robust in structure, and stable in measurement. Finally, the parallel structured fiber-optic FPI scheme proposed in this paper can also be applied to other sensing field, and provide a new perspective idea for high sensitivity sensing. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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