采用高信噪比电磁诱导透明谱测定85Rb原子5D5/2态的超精细相互作用常数

摘要

基于85Rb原子5S1/2-5P3/2-5D5/2阶梯型能级系统(780 nm+ 776 nm),利用高信噪比的电磁诱导透明谱对85Rb原子5D5/2态超精细分裂进行测量.其中,频率校准是通过位相型电光调制器和共焦法布里-珀罗腔共同实现的.通过测量85Rb原子5D5/2态(F”=5),(F”=4)及(F”=3)之间的超精细分裂,我们确定了85Rb原子5D5/2态的磁偶极超精细相互作用常数(A=-(2.222士0.019) MHz)和电四极超精细相互作用常数(B=(2.664士0.130)MHz).%We report the hyperfine splitting measurement of the 85Rb 5Ds/2 state by electromagnetically induced transparency spectroscopy with high signal-to-noise ratio in the 85Rb 5S1/2-5P3/2-5D5/2 ladder-type system (780 nm +-776 nm).The frequency calibration is performed by employing a phase-type electro-optic modulator with a confocal Fabry-Perot cavity.From the measured hyperfine splittings among the manifolds of (F" =5),(F" =4) and (F" =3) of the 85Rb 5D5/2 state,we determine the magnetic dipole hyperfine coupling constant (A =(-2.222 ±t 0.019) MHz) and the quadrupole coupling constant (B =(2.664 4± 0.130) MHz) of 5D5/2 state of 85Rb atoms.