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. 2022 Jan 24;12:1280. doi: 10.1038/s41598-022-05313-9

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© The Author(s) 2022

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(Top) Schematic of the measuring setup implemented to monitor vibrations. The injected and reflected light from the grating are illustrated with a broad and narrow ‘spectrum’, respectively. (Bottom) Photographs of the mini oscilloscope, photodetector, and piezoelectric actuator with the fiber rotator attached on it. PC is personal computer. The photos were taken by one of the authors (J. Villatoro).