New phenomena in Doppleron resonances

In an inhomogeneously Doppler broadened three-level system we analyze the absorption of a probe laser when a strong standing-wave laser pumps a transition sharing a level with the probe transition. Doppleron resonances occur for a pump field tuned off the resonant frequency. Their radiative shifts and strengths versus the pump field intensity are analyzed. The contribution of coherent and incoherent processes are separated. A large signal created by the pump field spatial dependence for the stationary molecules appears at the center of the probe absorption Doppler profile. A comparison is made with an experiment by Reid and Oka (Phys. Rev. Lett. 38 (1977) 67). © 1981.