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Sensitivity-improved plasmonic fiber-optic refractometer based on differential measurement between cut-off and plasmonic resonances

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Abstract

Based on differential intensity measurement between the cut-off and Plasmon resonances of an Au-coated tilted fiber Bragg grating, refractometer with RI sensitivity of 920 dB/RIU over the range of 1.332 to 1.357 has been achieved.

© 2015 Optical Society of America

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