2012
DOI: 10.1007/s13320-012-0072-5
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Liquid Crystal-Based Hydrophone Arrays

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 … Show more

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Cited by 13 publications
(8 citation statements)
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“…In short-pitch DHFLC cells, the FLC helix is characterized by a submicron helix pitch, P < 1 µm, and a relatively large tilt angle, θ > 30 • . Electro-optical response of DHFLC cells exhibits a number of peculiarities that make them useful for LC devices such as high speed spatial light modulators [12][13][14][15][16], colour-sequential liquid crystal display cells [17] and optic fiber sensors [18,19]. The effects caused by electric-field-induced distortions of the helical structure underline the mode of operation of such cells.…”
Section: Introductionmentioning
confidence: 99%
“…In short-pitch DHFLC cells, the FLC helix is characterized by a submicron helix pitch, P < 1 µm, and a relatively large tilt angle, θ > 30 • . Electro-optical response of DHFLC cells exhibits a number of peculiarities that make them useful for LC devices such as high speed spatial light modulators [12][13][14][15][16], colour-sequential liquid crystal display cells [17] and optic fiber sensors [18,19]. The effects caused by electric-field-induced distortions of the helical structure underline the mode of operation of such cells.…”
Section: Introductionmentioning
confidence: 99%
“…Thus, V‐shaped electro‐optical response is shown to be an inherent property of a DHFLC cell under a special choice of the applied rectangular alternating electric field waveform, frequency, and the cell geometry. In contrast to other known V‐shaped FLC modes, the V‐shaped switching for DHFLCs is observed in a broadband frequency range even higher than 1 kHz and not limited to a certain characteristic frequency . Frequency independent V‐shaped DHFLC switching allows increasing, drastically, the operating frequency of FSC LCD cells (up to 1 kHz).…”
Section: Introductionmentioning
confidence: 91%
“…It is our task now to relate these matrices and the evolution operator given by Eq. (11). To this end, we use the boundary conditions requiring the tangential components of the electric and magnetic fields to be continuous at the boundary surfaces: F(0) = F m (0 − 0) and F(h) = F m (h + 0), and apply the relation (11) to the anisotropic layer of the thickness D to yield the following result…”
Section: A Input-output Relationsmentioning
confidence: 99%
“…Electro-optical response of DHFLC cells exhibits a number of peculiarities that make them useful for LC devices such as high speed spatial light modulators [5][6][7][8][9], coloursequential liquid crystal display cells [10] and optic fiber sensors [11]. The effects caused by electric-field-induced distortions of the helical structure underline the mode of operation of such cells.…”
Section: Introductionmentioning
confidence: 99%