Characterization of an airborne organic contaminant sensor based on microfibers with sol–gel film

Introduction: Based on microfibers with sol–gel film, this study focuses developing an organic contaminant sensing device to monitor airborne contamination in high-power laser facilities. Methods: The heightened the sensitivity external environment nano-structure of microfiber surface. relationship between additional transmission power loss caused by contaminants and filling rate porosity film was discussed. In addition, we obtained refractive index microstructure. Results: experimental results indicated that employing microstructure coating could significantly improve contaminants. precision surface can reach ng/cm 2 . When concentration is lower than 7.5%, adsorption process dominated single-molecule adsorption, increases exponentially increasing concentration, while limit 70 ppm. exceeds multimolecular adsorption. Therefore, related contaminants, 10 Discussion: explored mechanism at different concentrations. Langmuir monolayer isotherm model Freundlich multi-molecular layer adopted analyze verify results, which suggested agree well simulation results. This work be considered for situ monitoring transmittance optics it also provides a new research method vacuum environment.