Frequency Shifts in a Coherent Population Trapping Cs Vapor Cell Atomic Clock

Area of Science:

• Atomic, Molecular, and Optical Physics
• Metrology and Measurement Science

Background:

• Atomic clocks are crucial for timekeeping and navigation.
• Coherent Population Trapping (CPT) offers a promising approach for miniaturized atomic clocks.

Purpose of the Study:

• To investigate frequency shifts in a microwave cesium vapor cell atomic clock utilizing CPT.
• To establish a comprehensive database of experimental parameter influences on clock frequency.

Main Methods:

• Measurements of frequency shifts in a cesium vapor cell atomic clock.
• Systematic investigation of parameters including laser power, frequency, microwave power, cell temperature, and magnetic field.
• Analysis of component temperature and optical element alignment effects.

Main Results:

• Detailed frequency shift measurements were performed.
• The dependence of clock frequency on various experimental parameters was quantified.
• The stability budget of the clock frequency over one day was analyzed.

Conclusions:

• The study provides a foundational dataset for CPT-based cell clock development.
• Understanding these parameters is key to enhancing mid- and long-term stability.
• This research paves the way for more stable and accurate CPT cell clocks.