Optical microphone based on Sagnac interferometer with polarization maintaining optical fibers

Konrad Markowski; Jarosław Turkiewicz; Tomasz Osuch

doi:10.1117/12.2035415

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25 October 2013 Optical microphone based on Sagnac interferometer with polarization maintaining optical fibers

Konrad Markowski, Jarosław Turkiewicz, Tomasz Osuch

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Proceedings Volume 8903, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2013; 89030Q (2013) https://doi.org/10.1117/12.2035415
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2013, 2013, Wilga, Poland

Abstract

This paper describes possible use of Sagnac interferometer, based on the polarization maintaining fiber, as an optical microphone. Operation of investigated setup is based on the refractive index changes induced by acoustic wave and fiber strain. In the conducted experiment, Sagnac interferometer working as an optical microphone was able to achieve 6 dB bandwidth up to 4.5 kHz. Possibilities for linear operation was examined as well. Experimental results are preceded by a mathematical analysis of the operating principles.

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Konrad Markowski, Jarosław Turkiewicz, and Tomasz Osuch "Optical microphone based on Sagnac interferometer with polarization maintaining optical fibers", Proc. SPIE 8903, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2013, 89030Q (25 October 2013); https://doi.org/10.1117/12.2035415

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