Sub-ppb-level CH4 detection by exploiting a low-noise differential photoacoustic resonator with a room-temperature interband cascade laser

Optics Express
Huadan ZhengZhe Chen

Abstract

An ultra-highly sensitive and robust CH4 sensor is reported based on a 3.3 µm interband cascade laser (ICL) and a low-noise differential photoacoustic (PAS) cell. The ICL emission wavelength targeted a fundamental absorption line of CH4 at 2988.795 cm-1 with an intensity of 1.08 × 10-19 cm/molecule. The double-pass and differential design of the PAS cell effectively enhanced the PAS signal amplitude and decreased its background noise. The wavelength modulation depth, operating pressure and V-T relaxation promotion were optimized to maximize the sensor detection limit. With an integration time of 90 s, a detection limit of 0.6 ppb was achieved. No additional water or air laser cooling were required and thereby allowing the realization of a compact and robust CH4 sensor.

References

Nov 23, 2007·Optics Letters·A A KosterevF K Tittel
Mar 5, 2013·Optics Letters·Yingchun CaoJun Ma
Apr 2, 2014·Sensors·Pietro PatimiscoVincenzo Spagnolo
Apr 4, 2015·The Review of Scientific Instruments·J S LiA P Yalin
Aug 11, 2015·Optics Letters·Thomas BererBernhard Lendl
Nov 4, 2015·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Marilena GiglioVincenzo Spagnolo
Mar 15, 2016·Optics Letters·Huadan ZhengFrank K Tittel
Mar 31, 2016·Sensors·Angelo SampaoloVincenzo Spagnolo
Nov 20, 2016·Optics Express·Pietro PatimiscoVincenzo Spagnolo
Mar 10, 2018·Optics Express·Mikael LassenJan C Petersen
Mar 1, 2019·The Analyst·Teemu TombergLauri Halonen
Mar 6, 2019·The Review of Scientific Instruments·Sheng Zhou, Davide Iannuzzi

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Citations

Mar 3, 2021·Optics Letters·Shunda QiaoVincenzo Spagnolo

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