Fjodorow Peter, Frolov Mikhail P, Korostelin Yuri V, Kozlovsky Vladimir I, Schulz Christof, Leonov Stanislav O, Skasyrsky Yan K, Yuryshev Nikolai N
Opt Express. 2022 Oct 24;30(22):40347-40356. doi: 10.1364/OE.471851.
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 ≈ 850 m. Exemplary measurements of atmospheric HO and CH, and additionally introduced gas-phase HCl, CH, or CH 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 are discussed.
我们展示了Cr:CdSe激光器在λ = 3.1 - 3.4 µm附近用于高灵敏度多组分腔内吸收光谱的首次应用。报道了一种基于在单个泵浦脉冲激发后对多个（约70个）单个Cr:CdSe激光脉冲进行积分记录的检测方案。我们系统的灵敏度对应于有效吸收路径长度L≈850 m。给出了大气中HO和CH以及额外引入的气相HCl、CH或CH的示例测量结果。实现的噪声等效检测限在ppb范围内。讨论了进一步将灵敏度提高多达10倍的可能性。
