Ozone Detection via Deep-Ultraviolet Cavity-Enhanced Absorption Spectroscopy with a Laser Driven Light Source

We present a novel sensing approach for ambient ozone detection based on deep-ultraviolet (DUV) cavity-enhanced absorption spectroscopy (CEAS) using a laser driven light source (LDLS). The LDLS has broadband spectral output which, with filtering, provides illumination between similar to 230-280 nm. The lamp light is coupled to an optical cavity formed from a pair of high-reflectivity (R similar to 0.99) mirrors to yield an effective path length of similar to 58 m. The CEAS signal is detected with a UV spectrometer at the cavity output and spectra are fitted to yield the ozone concentration. We find a good sensor accuracy of

Automated summary

This study presents a novel approach for ambient ozone detection using deep-ultraviolet cavity-enhanced absorption spectroscopy and a laser driven light source. The laser driven light source has broadband spectral output, and by filtering, it provides illumination in the range of 230-280 nm. The detected CEAS signal is analyzed using a UV spectrometer and fitted to determine the ozone concentration. The experimental results show good sensor accuracy.