Suppression of Dick Effect in the Ramsey-CPT atomic clock by Interleaving Lock

TL;DR

This paper demonstrates that interleaving lock and optimizing operational parameters significantly suppress the Dick effect in Ramsey-CPT atomic clocks, enhancing their frequency stability to 10^-14.

Contribution

The study introduces a novel method of interleaving lock combined with parameter optimization to reduce the Dick effect in atomic clocks.

Findings

Dick effect induced Allan deviation reduced to 10^-14

Optimized duty cycle, detection time, and laser intensity improve stability

Interleaving lock effectively suppresses quantum projection noise limitations

Abstract

For most passive atomic clocks, the Dick effect is one of the main limits to reach its frequency stability limitation due to quantum projection noise. In this paper, we demonstrate that the minimization of the Dick effect for the Ramsey-CPT atomic clock can be accomplished by interleaving lock. By optimizing the duty circle of laser pulses, averaging time during detection and optical intensity of laser beam, the Dick effect induced Allan deviation can be reduced to the level of 10^-14.