Gain without inversion in a V-type system with low coherence decay rate for the upper levels
arXiv:physics/0405079
Abstract
Inversionless gain is observed in a V-type inhomogeneously broadened system without introducing any incoherent pumping and only by changing the collisional dephasing decay rate. In this system sub-Doppler linewidth is achieved with off-resonance pump detuning.
9 pages, 4 figures