Cavity Enhanced LED-Induced Fluorescence Detection of Nitrogen Dioxide

We propose to create an induced fluorescence-based monitor for the detection of nitrogen dioxide where the light source is a light emitting diode. Sensitivity of such a device will be greatly enhanced by the use of a high finesse optical cavity formed by two very high reflectivity mirrors which provide for many passes of the light emitted by the LED. The goal is to provide a monitor capable of measuring concentrations from to 10 parts per trillion to 1 part per million with 1 second sampling using proprietary CAPS-based technology. A major advantage of such an approach is that it provides a true measurement of NO2 rather than one derived from chemical manipulation in a highly robust, easy to use package.