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Related Experiment Video

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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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Published on: June 8, 2018

Dependence of small-scale atomic clock performance on frequency modulation parameters used in the frequency control

Matan Kahanov¹, Ido Ben-Aroya, Gadi Eisenstein

¹Electrical Engineering Department, Technion-Israel Institute of Technology Technion, Haifa 32000, Israel. kahanovm@tx.technion.ac.il

|May 3, 2008

Summary

Optimizing frequency modulation (FM) parameters in multifield FM spectroscopy directly enhances the stability of atomic clocks. Proper FM settings achieve an Allan deviation of 2.8 x 10(-11)/√τ for coherent population trapping clocks.

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Area of Science:

Atomic, Molecular, and Optical Physics
Metrology and Measurement Science

Background:

Coherent population trapping (CPT) atomic clocks offer high precision for timekeeping.
Frequency modulation (FM) spectroscopy is a technique used for precise frequency measurements.

Purpose of the Study:

To establish a direct relationship between FM parameters in a frequency-locked loop (FLL) and the stability of a CPT atomic clock.
To identify optimal FM parameters for maximizing atomic clock performance.

Main Methods:

Utilizing multifield FM spectroscopy within a frequency-locked loop.
Systematically varying FM parameters and measuring the resulting Allan deviation of a CPT atomic clock.

Main Results:

A direct correspondence was found between specific FM parameters and clock stability.
Optimized FM parameters resulted in an Allan deviation of 2.8 x 10(-11)/√τ.
Suboptimal FM parameters led to predictable decreases in clock stability.

Conclusions:

The choice of FM parameters is critical for achieving high stability in small-scale CPT atomic clocks.
Multifield FM spectroscopy provides a viable method for optimizing atomic clock performance.
This work offers practical guidance for enhancing the precision of atomic clocks.