Inversionless laser from a closed multilevel system Article

cited authors

  • Zhu, Y; Mullins, OC; Xiao, M

fiu authors


  • We show that a closed four-level system can exhibit lasing without population inversion in any state basis. The same system can be also made to exhibit lasing without population inversion in the bare-state basis but with population inversion in the dressed-state basis. We derive the conditions of lasing without inversion and examine the dependence of the gain on various system parameters. The lasing threshold and the steady-state photon numbers are calculated. Comparison with a ssV-type, three-level model is presented. © 1993 The American Physical Society.

publication date

  • January 1, 1993

Digital Object Identifier (DOI)

start page

  • 602

end page

  • 609


  • 47


  • 1