用脉冲半导体激光观察铷原子基态塞曼能级的相干共振

Observation of Zeeman coherences within the ground state of rubidium atoms using pulsed diode laser

用半导体激光脉冲序列泵浦汽泡铷原子,观察其基态能级的△m=1和△m=2的塞曼(Zeeman)相干.利用直接调制激光二极管注入电流的增益开关技术,在波长780nm处产生约200ps的激光脉冲.对△m=1,用偏振光谱学方法检测;而对△m=2,则直接使用前向散射光谱学方法检测.

Zeeman coherences with Am = 1 and Am=2 are observed in the ground state of natural rubidum vapor optically pumped with a laser diode pulse train. The laser pulse of approximately 200ps at 780 nm are produced by gain-switching through direct modulation of the inject current of the laser. Δm = 1 coherences are detected by a probe beam using the polarization speotrosoopy technique, while the forward scattering spectroscopy technique is used to detect the Δm=2 coherences.