Highly sensitive, all solid state fibre optic oxygen sensor based on the sol-gel coating technique

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Highly sensitive, all solid state fibre optic oxygen sensor based on the sol-gel coating technique

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Published

A fibre optic sensor probe based on the fluorescence quenching of an optically active sol-gel coating is demonstrated. The simplified probe design includes a blue LED light source, a photodiode silicon detector and a bifurcated optical fibre. The sensor performance was characterised by a detection limit of <1 ppm of oxygen vapour, a response time of <10 s and a linear dynamic range for oxygen concentrations extending from 1 to 1000 ppm.

Inspec keywords: fibre optic sensors; optical films; oxygen; gas sensors; sol-gel processing; radiation quenching

Other keywords: all solid state fibre optic oxygen sensor; fluorescence quenching; sol-gel coating; probe design; vapour detection; blue LED light source; linear dynamic range; response time; bifurcated optical fibre; O2; photodiode silicon detector

Subjects: Chemical sensors; Fibre optic sensors; Chemical variables measurement; Chemical sensors; Fibre optic sensors; fibre gyros

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