Experimental setup (VIDEO) Optica This video is under embargo. Please login to access this video. Caption To achieve fast detection of low gas concentrations, the researchers combined a laser with an extremely fast tunable wavelength with quartz-enhanced photoacoustic spectroscopy and integrated coherent control for enhanced precision and stability. Credit Jonas Herbig Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.