Liquid Crystal-Based Hydrophone Arrays

Zourab Brodzeli; Leonardo Silvestri; Andrew Michie; Vladimir G. Chigrinov; Qi Guo; Eugene P. Pozhidaev; Alexei D. Kiselev; Francois Ladouceur

doi:10.1007/s13320-012-0072-5

Photonic Sensors ›› 2011, Vol. 2 ›› Issue (3) : 237 -246. DOI: 10.1007/s13320-012-0072-5

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Liquid Crystal-Based Hydrophone Arrays

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Abstract

We describe a fiber optic hydrophone array system that could be used for underwater acoustic surveillance applications (e.g. military, counter terrorist, and customs authorities in protecting ports and harbors), offshore production facilities or coastal approaches as well as various marine applications. In this paper, we propose a new approach to underwater sonar systems using the voltage-controlled liquid crystals and simple multiplexing method. The proposed method permits measurement of sound under water at multiple points along an optical fiber using the low cost components and standard single mode fiber, without complex interferometric measurement techniques, electronics or demodulation software.

Keywords

Ferroelectric liquid crystal / electrooptic response / hydrophone / sonar / deformed helix ferroelectric liquid crystal / fiber Bragg grating

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Zourab Brodzeli, Leonardo Silvestri, Andrew Michie, Vladimir G. Chigrinov, Qi Guo, Eugene P. Pozhidaev, Alexei D. Kiselev, Francois Ladouceur. Liquid Crystal-Based Hydrophone Arrays. Photonic Sensors, 2011, 2(3): 237-246 DOI:10.1007/s13320-012-0072-5

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