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Single-mode-fiber evanescent polarizer/amplitude modulator using liquid crystals

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Abstract

An in-line polarizer has been demonstrated that uses the birefringent properties of a nematic liquid crystal placed in the evanescent field of a single-mode fiber. A polarization-extinction ratio of 45 dB was measured with an insertion loss of 1.1 dB. Amplitude modulation was also demonstrated by using an external electric field to reorient the liquid-crystal molecules.

© 1986 Optical Society of America

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