"Velocity-selective direct frequency-comb spectroscopy of atomic vapors" by Jason E. Stalnaker, S. L. Chen et al.
We present an experimental and theoretical investigation of two-photon direct frequency-comb spectroscopy performed through velocity-selective excitation. In particular, we explore the effect of repetition rate on the [formula] two-photon transitions excited in a rubidium atomic vapor cell. The transitions occur via stepwise excitation through the [formula] states by use of the direct output of an optical frequency comb. Experiments were performed with two different frequency combs, one with a repetition rate of [formula] MHz and one with a repetition rate of [formula] MHz. The experimental spectra are compared to each other and to a theoretical model.
Stalnaker, J.E., S.L. Chen, M.E. Rowan, K. Nguyen, T. Pradhananga, C.A. Palm, and D.F. Jackson Kimball. 2012. "Velocity-selective direct frequency-comb spectroscopy of atomic vapors." Physical Review A 86(3): 033832 - 033840.