Atomic clocks can be considered as the cornerstone of the development of GNSS (Global Navigation Satellite System), aerospace and telecommunication technologies. Without highly precise timekeeping devices, services such as GPS, Galileo, and COMPASS would not function effectively. The most advanced version of this technology is the pulsed optical pumping (POP) clock, which has been developed in Italy by the National Institute of Metrological Research (INRIM) and engineered by Leonardo S.p.A. Compact atomic clocks based on vapor-cells rely on the measurement of the absorption of a laser resonant with the atomic vapor. Various factors influence the quality of the absorption signal and, consequently, the performance of the atomic clock.