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
- Acta Photonica Sinica
- Vol. 49, Issue 12, 42 (2020)
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)
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Table 1. Wavelength based axial strain sensitivity of the thin-and standard-diameter ExTFGs
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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
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