Tunable mid-infrared laser sources for trace-gas analysis

D. B. Kolker, I. V. Sherstov, A. A. Boyko, B. N. Nyushkov, E. Y. Erushin, N. Y. Kostyukova, A. I. Akhmathanov, A. Y. Kiryakova, A. V. Pavluck

Research output: Contribution to journalConference articlepeer-review


We demonstrate advanced experimental approaches to photoacoustic gas detection with tunable mid-infrared (mid-IR) laser sources of different types. A gas analyzer for registration of various gas components based on a tunable narrow-linewidth optical parametric oscillator (OPO) was designed and investigated. Using this OPO, the possibility of measuring the trace concentration (~2÷3 ppm) of methane (CH4) in air was experimentally shown. The gas detection capability was enhanced by introducing injection seeding into the OPO. Another gas analyzer was based on a quantum cascade laser (tunable within the range ~7.6 ÷7.7 μm) and a resonant differential photoacoustic detector. Detection of the ultra-low concentration (~0.3 ppm) of methane in air was achieved (the standard dispersion was (1σ) ≈ (10–11) ppb with an integration time of 10 s). We compare the presented approaches and outline their further development.

Original languageEnglish
Article number012013
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 9 Nov 2021
Event9th International Symposium on Modern Problems of Laser Physics, MPLP 2021 - Novosibirsk, Russian Federation
Duration: 22 Aug 202128 Aug 2021




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