| Title: | Ozone Detection via Deep-Ultraviolet Cavity-Enhanced Absorption Spectroscopy with a Laser Driven Light Source |
| Address: | "Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA" |
| ISSN/ISBN: | 1424-8220 (Electronic) 1424-8220 (Linking) |
| Abstract: | "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 ~230-280 nm. The lamp light is coupled to an optical cavity formed from a pair of high-reflectivity (R~0.99) mirrors to yield an effective path length of ~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 <~2% error and sensor precision of ~0.3 ppb (for measurement times of ~5 s). The small-volume (<~0.1 L) optical cavity is amenable to a fast response with a sensor (10-90%) response time of ~0.5 s. Demonstrative sampling of outdoor air is also shown with favorable agreement against a reference analyzer. The DUV-CEAS sensor compares favorably against other ozone detection instruments and may be particularly useful for ground-level sampling including that from mobile platforms. The sensor development work presented here can also inform of the possibilities of DUV-CEAS with LDLSs for the detection of other ambient species including volatile organic compounds" |
| Keywords: | *Ozone Spectrum Analysis/methods Light Lighting Lasers cavity-enhanced spectroscopy deep ultraviolet ozone ultraviolet spectroscopy; |
| Notes: | "PubMed-not-MEDLINEPuga, Anthony Yalin, Azer eng APP-399364/Colorado Office of Economic Development and International Trade - Advanced Industries/ Switzerland 2023/06/10 Sensors (Basel). 2023 May 23; 23(11):4989. doi: 10.3390/s23114989" |
