Off-axis re-entrant cavity ring-down spectroscopy with a mid-infrared continuous-wave optical parametric oscillator

J. Peltola, Markku Vainio, Ville Ulvila, M. Siltanen, M. Metsälä, L. Halonen

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)


We demonstrate an off-axis cavity ring-down spectroscopy system, which uses a mid-infrared continuous- wave optical parametric oscillator as a light source. Off-axis injectionwith re-entrant configuration of the ring-down cav- ity is used to achieve high spectral resolution while main- taining high measurement speed. This makes the setup suit- able for sensitive molecular spectroscopy in the mid-infrared region, particularly for studies that require high temporal resolution. Formaldehyde (H2CO) absorption spectrum at 3.4 µmismeasured using the off-axis re-entrant cavity ring- down spectrometer.
Original languageEnglish
Pages (from-to)839-847
JournalApplied Physics B: Lasers and Optics
Issue number3
Publication statusPublished - 25 May 2012
MoE publication typeA1 Journal article-refereed


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