Fiber specklegram sensors (FSS) for measuring high frequency mechanical perturbations

Alejandro Hoyos; Nelson Darío Gómez; Jorge A. Gómez

doi:10.1117/12.2026075

18 November 2013 Fiber specklegram sensors (FSS) for measuring high frequency mechanical perturbations

Alejandro Hoyos, Nelson Darío Gómez, Jorge A. Gómez

Proceedings Volume 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications; 8785BH (2013) https://doi.org/10.1117/12.2026075
Event: 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications, 2013, Porto, Portugal

Abstract

In this work, a technique for measuring high frequency micro-vibrations by using non holographic fiber specklegram sensor is experimentally demonstrated. In our setup, a laser source emitting at 632nm is coupled to a structure of Singlemode-Multimode-Singlemode fibers which produce a filtering effect that is used as optical transducer. Mechanical perturbations of controlled amplitude and frequency are applied to the Multimode fiber, which is fastened at the ends to induce vibrations. Perturbations higher than 3 KHz and below one micron are perfectly recovered by the system, which additionally, exhibits a linear response. Due to the low cost and the simplicity of the technique, it becomes an interesting method for the implementation of fiber sensors in a wide range of engineering applications.

Citation Download Citation

Alejandro Hoyos, Nelson Darío Gómez, and Jorge A. Gómez "Fiber specklegram sensors (FSS) for measuring high frequency mechanical perturbations", Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 8785BH (18 November 2013); https://doi.org/10.1117/12.2026075

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