PROJECT TITLE :
Remote Low-Coherence Fiber Vibrometer With Wide Dynamic Range
We have a tendency to gift a distant low-coherence fiber vibrometer, which is composed of a hybrid configuration of Mach–Zehnder and Sagnac interferometer. In the interferometer, the signal and reference beams travel along the same path however in opposite directions. Owing to the fiber differential interferometric theory and a passive demodulation algorithm, absolute amplitude at a distance additional than 1 m could be measured. The experimental results demonstrate that the vibrometer encompasses a wide dynamic range for amplitude measurement from four.thirty four pm to 2.forty three mm. The deviation of measured amplitude is but 0.eight dB, and the frequency response vary is 30 Hz–eleven kHz. The proposed method is doubtless suitable for applications that need noncontact and high-dynamic-range measurements.
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