Photoacoustic methane gas analyser based on a 3.3-mm optical parametric oscillator

I. V. Sherstov, D. B. Kolker

Research output: Contribution to journalArticlepeer-review


We demonstrate a bench-scale prototype of a photoacoustic (PA) methane gas analyser that takes advantage of an optical parametric oscillator (OPO) based on a fan-out MgO:PPLN structure and resonant differential PA detector. The OPO emits in a repetitively pulsed mode (~1750 Hz) at an idler wavelength of ~3.3 mm with an average power of ~40–50 mW. Using the prototype laser PA gas analyser, we experimentally demonstrate the feasibility of measuring the background methane concentration in air (~2–3 ppm of CH4). The threshold sensitivity of the PA gas analyser (1s) is determined to be ~49 ppb of CH4

Original languageEnglish
Pages (from-to)1063-1067
Number of pages5
JournalQuantum Electronics
Issue number11
Publication statusPublished - Nov 2020


  • Methane
  • Optical parametric oscillator
  • Photoacoustic gas analyser
  • Resonant differential photoacoustic detector
  • resonant differential photoacoustic detector
  • photoacoustic gas analyser
  • methane
  • optical pararnetric oscillator

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