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A Vibrometer Based on Magnetorheological Optical Resonators

机译：基于磁流变光学谐振器的振动计

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This paper addresses the feasibility of an optical vibrometer that is based on the shift of the optical modes, also known as whispering gallery modes (WGMs), of a magnetorheological optical resonator. The optical resonator that is used in this study is fabricated by mixing polyvinyl chloride plastisol with magnetically polarizable particles. When a permanent magnet that is located nearby the optical resonator is moved, it induces a perturbation of the morphology of the resonator, due to the magnetostrictive effect. This change in the morphology induces a shift in the optical modes of the resonator. The shift of the optical modes can be related to the displacement of the permanent magnet. The proposed sensor concept is based on monitoring the displacement of a tiny magnet that is attached to a moving surface. The optical quality factor of the resonator used in these studies was of the order of 106. The experimental results show a sensitivity of 0.32 pm/μm and a resolution that is less than 300 nm.
机译：本文讨论了基于磁流变光学谐振器的光学模式（也称为耳语画廊模式（WGM））的偏移的光学振动计的可行性。本研究中使用的光学谐振器是通过将聚氯乙烯增塑溶胶与可磁极化的颗粒混合而制成的。当位于光学谐振器附近的永磁体移动时，由于磁致伸缩效应，它引起谐振器形态的扰动。形态的这种变化引起谐振器的光学模式的偏移。光学模式的偏移可能与永磁体的位移有关。提出的传感器概念基于监视附着在运动表面上的微小磁体的位移。这些研究中使用的谐振器的光学品质因数约为106。实验结果表明，灵敏度为0.32 pm /μm，分辨率小于300 nm。

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