Amplitude Modulation of a Low-Coherence Source, Applications to Distance and Dynamic Displacement Sensing
BibTeX
@MISC{Lloret_amplitudemodulation,
author = {Ra Lloret and Daniele Inaudi},
title = {Amplitude Modulation of a Low-Coherence Source, Applications to Distance and Dynamic Displacement Sensing},
year = {}
}
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Abstract
The possibilities of the radio-frequency amplitude modulation of a low-coherence source for distance and displacement measurements are discussed. This intensity based method, used within a Michelson interferometer, is a novel alternative to perform dynamic deformation measurements. The theoretical background is presented, together with the experimental verification of the principle. Besides, the results of the first quasi-dynamic tests are shown and the perspectives of the technique discussed. This method is specially useful for the dynamic monitoring of civil structures, where large measurements bases are needed. Furthermore, the application of the amplitude modulation for distance measurements is demonstrated experimentally. SUBJECT TERMS Fiber sensors, amplitude modulation, low-coherence interferometry, displacement sensors, dynamic deformations, distance measurements.
