Absorption quantization in the diagnosis of absorption spectroscopy

Jiachen Sun; Jun Chang; Qinduan Zhang; Peng Xu; Zhifeng Zhang

doi:10.1117/12.2599852

24 November 2021 Absorption quantization in the diagnosis of absorption spectroscopy

Jiachen Sun, Jun Chang, Qinduan Zhang, Peng Xu, Zhifeng Zhang

Proceedings Volume 12065, AOPC 2021: Optical Sensing and Imaging Technology; 1206504 (2021) https://doi.org/10.1117/12.2599852
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

The ultimate detection limits based on gas absorption detection techniques are always of interest to researchers. Regardless of the detection limits established by various systems, gas absorption itself has an unbreakable constraint, namely the inherent limit (IL), which refers to the theoretical limit when only one gas molecule can participate in the absorption in the lower-state level. When the number of molecules in the lower-state is extended to n, the number of molecules of the absorbed species on effective optical path is considered as n·IL. This phenomenon is interpreted as the absorption quantization, and IL is considered as the smallest unit of quantization. The IL obtained by establishing a certain theoretical analysis can be determined under a definite detection conditions, such as absorbed species, specific absorption transition, temperature. The R(76) line near 2390.522470 cm^-1 of CO₂and P(7) line near 2115.628975 cm^-1 of CO are chosen to explore IL at different temperatures and corresponding absorption. Furthermore, a constructive method has been proposed to change the IL.

Citation Download Citation

Jiachen Sun, Jun Chang, Qinduan Zhang, Peng Xu, and Zhifeng Zhang "Absorption quantization in the diagnosis of absorption spectroscopy", Proc. SPIE 12065, AOPC 2021: Optical Sensing and Imaging Technology, 1206504 (24 November 2021); https://doi.org/10.1117/12.2599852

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