Intracavity absorption spectroscopy of HCl isotopes, H 2 O, CH 4 , C 2 H 4 , and C 2 H 6 in the 3.1–3.4 µm spectral range using a Cr:CdSe laser
We demonstrate the first application of a Cr:CdSe laser for highly-sensitive multicomponent intracavity absorption spectroscopy around λ = 3.1–3.4 µm. A detection scheme based on an integrated recording of multiple (∼70) individual Cr:CdSe laser pulses after a single pump-pulse excitation is reporte...
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Published in | Optics express Vol. 30; no. 22; p. 40347 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
24.10.2022
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Online Access | Get full text |
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Summary: | We demonstrate the first application of a Cr:CdSe laser for highly-sensitive multicomponent intracavity absorption spectroscopy around λ = 3.1–3.4 µm. A detection scheme based on an integrated recording of multiple (∼70) individual Cr:CdSe laser pulses after a single pump-pulse excitation is reported. The sensitivity of our system corresponds to an effective absorption path length of L eff ≈ 850 m. Exemplary measurements of atmospheric H 2 O and CH 4 , and additionally introduced gas-phase HCl, C 2 H 4 , or C 2 H 6 are presented. The achieved noise-equivalent detection limits are in the ppb range. Possibilities for further sensitivity enhancement by up to a factor of 10 4 are discussed. |
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ISSN: | 1094-4087 1094-4087 |
DOI: | 10.1364/OE.471851 |