Open AccessLight shifts in the rubidium CPT atomic clock with laser current modulation at 3.4 and 6.8 GHz
Author(s) -
S. M. Ignatovich,
I. S. Mesenzova,
M. A. Skvortsov,
N. L. Kvashnin,
V. I. Vіshnyakov
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2067/1/012006
Subject(s) - atomic clock , rubidium , laser , microwave , atomic physics , modulation (music) , physics , resonance (particle physics) , optics , optoelectronics , materials science , potassium , quantum mechanics , acoustics , metallurgy
In the paper presents results of an experimental comparison of the CPT parameters of the resonance at the D1 line in 87 Rb when the laser current is modulated at frequencies 3.4 GHz and 6.8 GHz. Resonances are investigated for slope to noise ratio (Q-factor) and shifts from the microwave power. The reproducibility of the parameters of VCSEL lasers required to obtain long-term stability of an atomic clock is considered. The obtained CPT instabilities of the atomic clock for 1 second were 1.2·10 −11 for the case of 3.4 GHz and 4·10 −12 for 6.8 GHz.