Fibre optical sensor for C2H2 gas using sealed arc fusion spliced gas filled PBGF reference cell

Austin, Ed, van Brakel, Adriaan, Petrovich, Marco N. and Richardson, David J. (2008) Fibre optical sensor for C₂H₂ gas using sealed arc fusion spliced gas filled PBGF reference cell. Europt(R)ode IX, Dublin, Ireland. 30 Mar - 02 Apr 2008. 2 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

It is of great importance to develop gas sensing techniques which are selective, quantitative, fast-acting and not susceptible to poisoning. Spectroscopic optical gas sensors, especially those capable of remote sensing over optical fibres, are highly attractive for fast real-time detection and measurement of many gases [1]. One highly selective optical gas sensing method is correlation spectroscopy (CS) [2], in which a reference sample of target gas is held fixed within the interrogation system to act as a spectral reference, and is then compared with the spectrum of the test gas to obtain the measurement. We have suggested that a Photonic Bandgap Fibre (PBGF), filled with the target gas, provides a very effective and compact reference, with a clear advantage over traditional linear cells, which are bulky, intricate, fragile, difficult to align and expensive [3].

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