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Proceedings Paper

A comprehensive experimental investigation of sensitivity enhancement for optical fiber humidity sensor employing localized surface plasmon resonance spectroscopy
Author(s): R. Aneesh; Sunil Khijwania
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Paper Abstract

An optical fiber relative humidity (RH) sensor exploiting Localized Surface Plasmon Resonance (LSPR) is designed in order to achieve a linear response over a large dynamic range with an optimized sensitivity. To further enhance the sensitivity, in-house developed gold nanoparticle film was also synthesized onto a U-shaped and an etched-core region of the optical fiber. A throughout linear response over a dynamic range of ~20-90% RH with a very high sensitivity is observed. Importantly, reducing the core diameter resulted in four time sensitivity enhancement. In addition, the sensor response was observed to be highly reversible and repeatable.

Paper Details

Date Published: 20 May 2013
PDF: 5 pages
Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87941M (20 May 2013); doi: 10.1117/12.2026762
Show Author Affiliations
R. Aneesh, Indian Institute of Technology Guwahati (India)
Sunil Khijwania, Indian Institute of Technology Guwahati (India)

Published in SPIE Proceedings Vol. 8794:
Fifth European Workshop on Optical Fibre Sensors
Leszek R. Jaroszewicz, Editor(s)

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