Abstract

In this paper, the response of a tapered optical fiber humidity sensor is optimized, attending to the thickness of the sensitive coating, the dimensions of the taper, the light source, and the utilization of sensitive materials with different refractive indexes. The main novelty of this study is that the thickness of the sensitive layer is on the order of magnitude of the light wavelength used to excite the sensor. It is shown here that an estimation of the sensor sensitivity can be deducted from the transmitted optical power curve obtained during the layer-by-layer construction process. Theoretical and experimental results are presented.

© 2006 IEEE

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