Relationship between electromagnetically-induced transparency and Autler–Townes splitting in a Doppler-broadened system*
Pei Li-Ya†a), Niu Jin-Yanb), Wang Ru-Quanc), Qu Yi-Zhia), Zuo Zhan-Chunc), Wu Ling-Anc), Fu Pan-Ming‡c)
       
Energy-level diagram for EIT resonance and fluorescence excitation spectroscopy in a cascade three-level system.