Artifact side peaks in saturated absorption spectroscopy caused by inappropriate lock-in amplification

Abstract:Saturated absorption spectroscopy is a powerful technique that provides valuable information about gas-phase atomic targets, including not only the precise positions of transitions but also the effects of velocity-changing collisions, which manifest as changes in the shape of the peaks. However, using a lock-in amplifier inappropriately can generate artifact side peaks, potentially leading to a misinterpretation of results. To investigate the emergence of these artifacts, we conducted numerical calculations based on the basic Lambert-Beer's law. Our model reproduced the artifact side peaks and revealed that these artifacts become more significant as the transmittance of the probe laser decreases.

Author's final manuscript. 12 pages, 3 figures

Atomic Physics (physics.atom-ph); Quantum Physics (quant-ph)

arXiv:2608.23596 [physics.atom-ph]

(or arXiv:2608.23596v1 [physics.atom-ph] for this version)

https://doi.org/10.48550/arXiv.2608.23596 Focus to learn more arXiv-issued DOI via DataCite

Jpn. J. Appl. Phys. 62, 108006 (2023)

https://doi.org/10.35848/1347-4065/ad03a6 Focus to learn more DOI(s) linking to related resources

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