TY - JOUR
T1 - Evidence of lasing without inversion in a hot rubidium vapor under electromagnetically-induced-transparency conditions
AU - Wu, Haibin
AU - Xiao, Min
AU - Gea-Banacloche, J.
PY - 2008/10/23
Y1 - 2008/10/23
N2 - We report a likely observation of cw lasing without inversion in a gas of hot rubidium atoms in an optical cavity under conditions of electromagnetically induced transparency (EIT). The medium is pumped coherently and resonantly by a single "coupling" beam which also produces EIT in the lasing transition. The steady-state intensity exhibits thresholds as a function of the atomic density and the strength of the coupling beam. A theoretical model for an effective three-level lambda system indicates that gain without inversion is possible in this system if the two ground states are coupled by depolarizing collisions, and if the decay branching ratios meet certain conditions.
AB - We report a likely observation of cw lasing without inversion in a gas of hot rubidium atoms in an optical cavity under conditions of electromagnetically induced transparency (EIT). The medium is pumped coherently and resonantly by a single "coupling" beam which also produces EIT in the lasing transition. The steady-state intensity exhibits thresholds as a function of the atomic density and the strength of the coupling beam. A theoretical model for an effective three-level lambda system indicates that gain without inversion is possible in this system if the two ground states are coupled by depolarizing collisions, and if the decay branching ratios meet certain conditions.
UR - https://www.scopus.com/pages/publications/55049122468
U2 - 10.1103/PhysRevA.78.041802
DO - 10.1103/PhysRevA.78.041802
M3 - 文章
AN - SCOPUS:55049122468
SN - 1050-2947
VL - 78
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 4
M1 - 041802
ER -