Scientists at Istituto Nazionale di Ottica Applicata of the Consiglio Nazionale delle Ricerche in Pozzuoli, Italy, have demonstrated a 2.9- to 3.5-µm integrated cavity output spectrometer that employs a difference-frequency generator as its source
The team, directed by Paolo De Natale, is working to refine the instrument for in situ trace-gas analysis of CH4, C2H4, NH3 and N2O at minimum concentrations of hundreds of parts per trillion, with applications in the monitoring of volcanic gases.