[time-nuts] Mitigation of lamp oven and cavity oven temperature-induced frequency variation in rubidium atomic clock

[Mark Kahrs]

Just published in Review of Scientific Instruments:
https://doi.org/10.1063/5.0130524

ABSTRACT
The long-term frequency stability of the rubidium atomic clock is primarily
affected by temperature variations in the lamp oven and the cavity oven,
which cause changes in light intensity, which are then converted into
frequency variations. Therefore, we propose using light intensity
variations to actively improve the cavity oven and lamp oven temperature
sensitivity of the rubidium atomic clock. This is accomplished through
research into the theory of the rubidium atomic frequency standard,
specifically the effect of light intensity, lamp oven temperature, and
cavity oven temperature on the frequency deviation. In previous work, we
discovered the relationship between the light intensity and frequency
deviation by combining this with our engineering expertise. Furthermore,
some related experiments show that the method is feasible with the lamp
oven and cavity oven temperature sensitivity of the rubidium atomic clock
greatly improved, providing an effective way to improve the rubidium atomic
clock’s long-term frequency stability.