Demonstration of acoustic vibration sensor based on microfiber knot resonator

Sulaiman, A. and Muhammad, M.Z. and Harun, Sulaiman Wadi and Arof, Hamzah and Ahmad, Harith (2013) Demonstration of acoustic vibration sensor based on microfiber knot resonator. Microwave and Optical Technology Letters, 55 (5). pp. 1138-1141. ISSN 0895-2477, DOI

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A compact microfiber-based acoustic vibration sensor is demonstrated using microfiber knot resonator (MKR) structure, which is fabricated by flame brushing technique. It is observed that the extinction ratio of the resonant spectrum of the knot resonator is linearly proportional to the vibration amplitude. This is attributed to the interruption of the effective coupling of the MKR which is correlated with the exposed vibration force. It is also shown that the resonant wavelength shifts by about 0.19 nm as the normalized vibration energy is increased from 0 to 10%. The performance of the sensor is then further investigated by monitoring the fast Fourier transform (FFT) of the signal when the MKR is exposed to various vibration frequencies as a narrowband 1545 nm laser is injected into the MKR. In the spectra of the signals, the frequency of the applied vibration is clearly shown as it has the highest magnitude followed by the accompanying harmonics. This holds true for all vibration frequencies.

Item Type: Article
Uncontrolled Keywords: Acoustic sensors; Microfiber; Knot resonator; Vibration sensors
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 27 Oct 2015 03:32
Last Modified: 11 Oct 2018 02:44

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