实验上在87Rb玻色爱因斯坦凝聚体中, 分别采用激发态52P1/2中的超精细态F′=1和F′=2与基态52S1/2的超精细能级构成的Λ型三能级结构研究了电磁诱导透明和电磁诱导吸收现象。饱和吸收稳频技术和光学相位锁定技术为实验提供了稳定的探测光场和耦合光场。通过扫描探测光的频率, 绘制了电磁诱导透明和电磁诱导吸收中原子的吸收特性谱线。基于玻色爱因凝聚体抗干扰差的特征, 实验中采用吸收成像的方法来反映原子对探测光的吸收特性。实验中发现超精细能级的Zeeman效应使探测光和耦合光存在三种不同类型的跃迁:π跃迁、σ+跃迁和σ-跃迁, 这三种不同类型的跃迁对组成电磁诱导透明Λ型三能级结构和电磁诱导吸收类M型四能级结构起到了关键的作用。Induced Absorption in 87Rb Bose-Einstein Condensate

We have observed electromagnetically induced transparency and electromagnetically induced absorption in the D1 line of 87Rb Bose-Einstein condensate by taking the Λ-type three level structure consisting of the hyperfine of D1 line and ground state hyperfine line as the object of study.We combine the Frequency stabilization of saturation absorption and optical phase-locking loop techniques for providing stable probe light field and coupling light field, which finely modulate the frequency of probe light and coupling light.By scanning the frequency of probe light, the spectrum of atoms absorption can be plotted.Furthermore, considering of characteristics of poor anti-interference of BEC, absorption imaging is used to reflect the absorption characteristics of the probe light.It is found that there are three different types of transition involving of π、σ- and σ+ due to the presence of Zeeman effect.These three different types of transitions are composed of Λ-type three-level structure and similar M-type four-level structure, which play key roles in electromagnetically induced transparency and electromagnetically induced absorption.The combination of ultra-cold atoms and electromagnetically induced transparency with electromagnetically induced absorption plays an important and positive role in the research of information storage and light speed reduction.