Acta Photonica Sinica, Volume. 49, Issue 12, 42(2020)
Research on the Performance of Cantilever Low Frequency Vibration Sensor Based on Thin-diameter Excessively Tilted Fiber Grating
Figures & Tables(10)
Fig. 1. Schematic diagram of optical path coupling of a thin-diameter 81°ExTFG
Fig. 2. Spectra of TM and TE modes of ExTFG under full excitation in C-L band
Fig. 3. Comparison of axial strain response between thin-diameter ExTFG and standard-diameter ExTFG
Fig. 4. Comparison of bending strain response between thin- and standard-diameter ExTFGs
Fig. 5. Cantilever vibration detection system based on the thin-diameter ExTFG
Fig. 6. Vibration sensing output response of different wavelength points of thin-diameter ExTFG.
Fig. 7. Input-output amplitude response of the thin-diameter ExTFG at different vibration frequencies
Fig. 8. The time domain response of the 3 dB point of resonance peak of the fine diameter ExTFG and the frequency spectrum of the 25%, 50%, 75% and 100% wavelength points of the resonance peak (the inset is the SNR)
Table 1. Wavelength based axial strain sensitivity of the thin-and standard-diameter ExTFGs
View tableView in ArticleTable 1. Wavelength based axial strain sensitivity of the thin-and standard-diameter ExTFGs
Response mode Wavelength based axial strain sensitivity of the thin-diameter ExTFG/(pm·με-1) Wavelength based axial strain sensitivity of the standard-diameter ExTFG/(pm·με-1) TE -4.68 -2.8 TM -3.55 -1.8
Table 2. Vibration sensitivity of TM and TE modes of thin diameter ExTFG at different wavelengths of resonance peak with resonance frequency of 72 Hz
View tableView in ArticleTable 2. Vibration sensitivity of TM and TE modes of thin diameter ExTFG at different wavelengths of resonance peak with resonance frequency of 72 Hz
Wavelength point
(TM/ TE)
Property parameter
25% 50%
(3 dB point)
75% 100% Output amplitude V/V 0.976/1.46 1.44/1.5 1.44/1.36 0.576/0.8 Natural frequency f /Hz 72 72 72 72 Acceleration a/g 2.82 2.82 2.82 2.82 Maximum acceleration sensitivity S/(mV·g-1) 346.10/517.73 510.64/531.92 510.634/482.27 204.26/283.69
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Xue ZOU, Ou DENG, Bin-bin LUO, De-cao WU, Ming-fu ZHAO, Nian-bing ZHONG, Tao SONG, Shang-hai JIANG, Lang XIE, Peng LIU, En-hua LIU. Research on the Performance of Cantilever Low Frequency Vibration Sensor Based on Thin-diameter Excessively Tilted Fiber Grating[J]. Acta Photonica Sinica, 2020, 49(12): 42
Paper Information
Category: Fiber Optics and Optical Communications
Received: --
Accepted: --
Published Online: Mar. 11, 2021
The Author Email: LUO Bin-bin (luobinbin@cqut.edu.cn)
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