Measurement of light amplification in coherently pumped rubidium atoms

Noritsugu Shiokawa, Yoshio Toril, Takuya Hirano +1 more

Jin Woo Jun, Ho Seong Lee

Hoonsoo Kang, Lingling Wen, Yifu Zhu

We show that in a four-level atomic system with electromagnetically induced transparency, a coherent pump field can induce light amplification without or with population inversion. As the pump field intensity increases, the atomic system evolves from normal dispersion and amplification without population inversion into anomalous dispersion and amplification with population inversion. We report an experiment on light amplification in cold rubidium atoms and present experimental measurements that agree with theoretical calculations based on the four-level model system.

Fernand D. Bedard

Hoonsoo Kang, Lingling Wen, Yifu Zhu

We show that in a four-level atomic system with electromagnetically induced transparency, a coherent pump field can induce light amplification without or with population inversion. As the pump field intensity increases, the atomic system evolves from normal dispersion and amplification without population inversion into anomalous dispersion and amplification with population inversion. We report an experiment on light amplification in cold rubidium atoms and present experimental measurements that agree with theoretical calculations based on the four-level model system.

Igor M. Beterov, A. Dudnikov, I. I. Ryabtsev