Load and Vibration Optical Fiber Sensor Based on Miniature FabryPerot Cavity Encapsulated by Micrometer Thickness of Silica Film

In this article, an optical fiber sensor has been proposed to determine load and vibration signals based on the Fabry-Perot cavity. The load sensitivity has been experimentally demonstrated to be about 0.0148 nm/g. The vibration signal was measured by tracing the changes in frequency and amplitude intensity. Experimental results reveal that this sensor has the resonant frequency of 150 Hz, at which the signal-to-noise ratio is 35 dB. The operating frequency range for the proposed vibration sensor is 200-400 Hz, and the response sensitivity to vibration signals with different amplitudes is 0.0042 V/V.

Automated summary

In this article, an optical fiber sensor based on the Fabry-Perot cavity has been proposed for determining load and vibration signals. The experimental results demonstrate a load sensitivity of about 0.0148 nm/g. The vibration signal is measured by tracking frequency and amplitude intensity changes. Experimental results reveal a resonant frequency of 150 Hz for this sensor, with a signal-to-noise ratio of 35 dB. The proposed vibration sensor operates in a frequency range of 200-400 Hz and exhibits a response sensitivity of 0.0042 V/V to vibration signals with different amplitudes.