Sensing properties of ITO coated optical fibers to diverse VOCs

Indium tin oxide ITO-coated optical fibers have been very recently presented as lossy mode resonance (LMR) based refractometers as well as a label-free optical fiber sensing platform. Here, ITO coated optical fiber devices are used for the detection of volatile organic compounds (VOCs). These devices are immune to optical power variations due to their wavelength-based detection technique. More precisely, the sensitivity of these devices to fixed concentrations of ethanol, acetone and methanol has been studied. Furthermore, the cross-sensitivity with temperature and relative humidity (RH) has been addressed.