Sub-Doppler light amplification in a coherently pumped atomic system Article

cited authors

  • Zhu, Y; Lin, J

fiu authors


  • We report the observation of steady-state amplification of a weak probe laser without population inversion in the bare states in a Doppler-broadened Λ-type Rb atomic system. The probe amplification was observed with the Rabi frequency of a coupling laser much smaller than the Doppler width and can be viewed as due to the dressed-state inversion. A 10% single-pass amplification of a weak probe laser was obtained, and the measured linewidth of the gain spectral feature approaches the Rb natural linewidth. A theoretical analysis based on a three-level Doppler-broadened Λ system is presented, and qualitative agreement with the experiment results is achieved. © 1996 The American Physical Society.

publication date

  • January 1, 1996

Digital Object Identifier (DOI)

start page

  • 1767

end page

  • 1774


  • 53


  • 3