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Multicomponent gas detection technology of FDM and TDM based on photoacoustic spectroscopy

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By Cunwei Tian, Hao Zhang, Siyu Qian, Cunying Yan
| osapublishing.org
Abstract In this paper, a multicomponent gas detection system based on photoacoustic spectroscopy (PAS) is proposed with a combination of frequency division multiplexing (FDM) and time division multiplexing (TDM), combining a resonance photoacoustic cell and broadband microphone. A PAS gas cell with a wide frequency response bandwidth was used to achieve the FDM by selecting a specific modulation frequency of each component gas.
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