Reaching 5E-13 short term frequency stability of the integrating sphere cold atom clock

TL;DR

This paper reports a significant improvement in the short-term frequency stability of an integrating sphere cold atom clock by optimizing signal intensity and feedback, achieving a stability of 5.0×10^{-13} τ^{-1/2}.

Contribution

The study demonstrates enhanced short-term stability of the cold atom clock through signal intensity increase and feedback optimization, providing a practical approach for clock performance improvement.

Findings

Achieved a short-term frequency stability of 5.0×10^{-13} τ^{-1/2}.

Identified the limiting factors affecting stability.

Optimized feedback loop improves clock performance.

Abstract

We present an improvement of short term frequency stability of the integrating sphere cold atom clock after increasing the intensities of clock signals and optimizing the feedback loop of the clock. A short term frequency stability of $5.0\times10^{-13}\tau^{-1/2}$ has been achieved and the limiting factors have been analyzed.