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Optical Fiber Interferometer to Study Surface Charges Produced by Triboelectric Forces

机译：光纤干涉仪研究摩擦电力产生的表面电荷

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The purpose of the study is to establish the feasibility of using an optical fiber interferometer to measure the electric field generated by surface charges. A Fourier transform method was devised to measure AC fields even under changing environmental conditions. Direct DC electric field measurement is feasible only under extremely stable environmental conditions. A single-mode fiber bonded onto a piezo film makes one arm of the optical interferometer. An electric field exerts a stress onto the piezo film which then stretches the bonding fiber. An optical path difference is thus created and observed as a phase shift in the interferometric output. Comparison of the spectra components of the modulated signal results in a temperature-independent phase shift factor. Experiments conducted under constant and varying temperatures resulted in similar predictions. Peak electric fields of 0.7 - 50,000 V/m are measured and demonstrated in the study. By varying the bonding fiber length, different ranges of electric fields can be detected. Further development of the method will lead to the realization of a field sensor.

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