Vol. 46, Issue 4, pp. 607-618
Keywords
humidity, hygrometer, laser spectroscopy, absorption
Abstract
A prototype optoelectronic hygrometer, based on absorption of laser light tuned to a specific rovibronic absorption line of H2O at 1364.68961 nm is described. Target application is meteorology, in particular precise and fast measurements of small-scale humidity fluctuations in turbulent atmospheric flows. Tests of the prototype instrument performed in the atmospheric boundary layer have proven the advantage of this optoelectronic sensor over typical, commercially available UV hygrometers designed for similar applications.