High quality electromagnetically induced transparency spectroscopy of 87Rb in a buffer gas cell with a magnetic field
Cheng Hong1, 2, Wang Han-Mu1, 2, Zhang Shan-Shan1, 2, Xin Pei-Pei1, 2, Luo Jun1, 2, Liu Hong-Ping1, 2, †
       

(color online) The effect of detuning of the coupling laser on the EIT spectral line with B = 0. A large detuning distorts the EIT spectral line seriously.