Za. Ansari et al., INFLUENCE OF OXYGEN ON THE GUIDING PROPERTIES OF V2O5-CLAD GLASS WAVE-GUIDE, Optical and quantum electronics, 29(5), 1997, pp. 533-537
An optical waveguide clad with V2O5 is proposed as a new type of oxyge
n sensor in ambient air. The presence of gas changes the light transmi
ssion (TE0-polarized mode) through the guide, due to the change in ref
ractive index of the cladding which changes the effective index of the
guide. O-2 gas concentration is varied from a few (approximate to 10)
ppm to several percent (4%). Sensors exhibit the same sensitivity at
a slightly elevated temperature. The increase in thickness of the clad
ding causes a reduction in sensitivity and increase in linearity. It i
s observed that the sensor exhibits the same performance using the sta
tic or incremental mode.