In-Fiber Collimator-Based Fabry-Perot Interferometer with Enhanced Vibration Sensitivity
AbstractA simple vibration sensor is proposed and demonstrated based on an optical fiber Fabry-Perot interferometer (FPI) with an in-fiber collimator. The device was fabricated by splicing a quarter-pitch graded index fiber (GIF) with a section of a hollow-core fiber (HCF) interposed between single mode fibers (SMFs). The static displacement sensitivity of the FPI with an in-fiber collimator was 5.17 × 10−4 μm−1, whereas the maximum static displacement sensitivity of the device without collimator was 1.73 × 10−4 μm−1. Moreover, the vibration sensitivity of the FPI with the collimator was 60.22 mV/g at 100 Hz, which was significantly higher than the sensitivity of the FPI without collimator (11.09 mV/g at 100 Hz). The proposed FPI with an in-fiber collimator also exhibited a vibration sensitivity nearly one order of magnitude higher than the device without the collimator at frequencies ranging from 40 to 200 Hz. This low-cost FPI sensor is highly-sensitive, robust and easy to fabricate. It could potentially be used for vibration monitoring in remote and harsh environments. View Full-Text
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Du, B.; Xu, X.; He, J.; Guo, K.; Huang, W.; Zhang, F.; Zhang, M.; Wang, Y. In-Fiber Collimator-Based Fabry-Perot Interferometer with Enhanced Vibration Sensitivity. Sensors 2019, 19, 435.
Du B, Xu X, He J, Guo K, Huang W, Zhang F, Zhang M, Wang Y. In-Fiber Collimator-Based Fabry-Perot Interferometer with Enhanced Vibration Sensitivity. Sensors. 2019; 19(2):435.Chicago/Turabian Style
Du, Bin; Xu, Xizhen; He, Jun; Guo, Kuikui; Huang, Wei; Zhang, Fengchan; Zhang, Min; Wang, Yiping. 2019. "In-Fiber Collimator-Based Fabry-Perot Interferometer with Enhanced Vibration Sensitivity." Sensors 19, no. 2: 435.
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