<ul><li>A new technique for using frequency combs to measure trace concentrations of gas molecules has been developed by researchers in the US.</li><li>The team reports single-digit parts-per-trillion detection sensitivity and extreme broadband coverage over 1000 cm-1 wavenumbers, enabling a variety of applications in fields such as medicine, environmental chemistry, and chemical kinetics.</li><li>The researchers have used a combination of cavity ringdown spectroscopy and frequency comb lasers to probe the absorption of gas samples at different light frequencies.</li><li>This new method allows the detection of various molecules, including biomedically relevant ones such as acetone and formaldehyde, with parts-per-trillion uncertainty, opening up possibilities for applications in trace gas detection and medical breath analysis.</li></ul>

Frequency-comb detection of gas molecules achieves parts-per-trillion sensitivity

Discover more