Novel mid-infrared LED as a source for optical fibre gas sensing

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Novel mid-infrared LED as a source for optical fibre gas sensing

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© The Institution of Electrical Engineers
Published

A mid-infra-red LED emitting at 3.36μm (FWHM 400nm) is used as a source for evanescent wave flammable gas sensing with fluoride fibre. The system described has a detection limit for propane of 1.5%. These preliminary data demonstrate the potential for distributed gas sensing using novel LED sources.

Inspec keywords: gas sensors; light emitting diodes; fibre optic sensors

Other keywords: 3.36 micron; optical fibre gas sensing; fluoride fibre; mid-infrared LED; evanescent wave flammable gas sensing; detection limit

Subjects: Chemical variables measurement; Fibre optic sensors; Fibre optics; Fibre optic sensors; fibre gyros; Light emitting diodes; Chemical sensors; Chemical analysis and related physical methods of analysis; Sensing and detecting devices

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      • Maccraith, B.D., Mccabe, S., Ruddy, V.: `The suitability of single-mode fluoride fibres for evanescent wave sensing', Proc. SPIE, 1991, 1587, p. 310–317, Chemical, Biochemical and Environmental Fiber Sensors III.
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