Velocity-selective spectroscopy measurements of Rydberg fine structure states in a hot vapor cell
He Jun1, 2, 3, Pei Dongliang1, Wang Jieying1, Wang Junmin1, 2, 3, †
       

(color online) EIT spectra across the principal quantum number 6S1/2 (F = 4) → 6P3/2 (F′) → 43S transition with and without RF bandwidth modulation. The probe laser is resonant to the transition of 6S1/2 (F = 4) → 6P3/2 (F′ = 4). The coupling laser frequency is changed for scanning across the allowed transitions. The Rabi frequencies of the probe laser and coupling laser are ∼ 1 MHz and ∼ 10 MHz, respectively.