Implementation of optical chemsensors based on HF-etched fibre Bragg grating structures

Zhou, Kaiming, Chen, Xianfeng F., Zhang, Lin and Bennion, Ian (2006). Implementation of optical chemsensors based on HF-etched fibre Bragg grating structures. Measurement science and technology, 17 (5), pp. 1140-1145.

Abstract

High-sensitivity optical chemsensors have been implemented by exploiting fibre Bragg grating structures UV-inscribed in D-shape, single-mode and multimode fibres and post-sensitized by hydrofluoric acid (HF) etching treatment. We have demonstrated that the Bragg grating structures which are intrinsically insensitive to chemicals can be sensitized by effective etching. All etched devices possess refractive index sensing capability that offers an encoding function to chemical concentrations. Most etched devices have been used to measure the concentrations of sugar solutions, showing a potential capability of detecting concentration changes as small as 0.1–0.5%.

Uncontrolled Keywords: fibre Bragg grating, tilted fibre grating, chemsensor, HF etching, multimode fibre, D-shape fibre
Published Date: 2006-04
Authors: Zhou, Kaiming
Chen, Xianfeng F.
Zhang, Lin
Bennion, Ian

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