Abstract
A computer simulation of the effect of frustration of total internal reflection in the region of the interface between glass and WO3 film with thin catalyst (Pt, Pd) layer by hydrogen with different concentration in the hydrogen-air mixture has been performed. A design of optical hydrogen sensor has been developed, and its laboratory model has been made on the basis of this effect with high hydrogen sensitivity in the range of low hydrogen concentration in the hydrogen-air mixture (down to under 0.01vol. % [H2]). The substantial increase in the hydrogen sensitivity of the sensor has been achieved through the multiple reflection by the glass/WO3 interface of IR light with 940 nm wavelength in its propagation through glass light guide.
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