Rubidium frequency standard with two-frequency laser pumping scheme

摘要

In this paper we compare two different excitation schemes of rubidium gas-cell frequency standard. We provide the stability estimations for one-frequency and two-frequency pumping schemes. Our calculations show the significant improvement of stability in the case of two-frequency scheme. It concerned with the absence of 'pockets' ('trap' states) and therefore with more efficient population collection on one of the working sublevels for two-pumping scheme.