Systematic removal of fluorescent optics in a 45-pass cavity-enhanced Raman setup yields detection limits of 3 ppm H2, 5 ppm N2, and 11 ppm O2 in 180 s measurements while resolving ambient CH4 at 2 ppm.
Portable Raman hydrogen concentration mapping with parts-per- billion sensitivity
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Systematic Investigation and Suppression of Fluorescence in High-Sensitivity Cavity-Enhanced Raman Gas Sensing
Systematic removal of fluorescent optics in a 45-pass cavity-enhanced Raman setup yields detection limits of 3 ppm H2, 5 ppm N2, and 11 ppm O2 in 180 s measurements while resolving ambient CH4 at 2 ppm.