Laser spectroscopy and atomic coherence

Ye Cun-Yun

P. R. Berman

The manner in which laser spectroscopic techniques can be use to probe collisional processes in atomic vapors is reviewed, A discussion of the saturation spectroscopy of three-level Systems, coherent transient spectroscopy, and a beam-laser spectroscopy System is presented. It is shown that such experiments can provide useful information on both the total and differential cross sections for atom-atom scattering.

Guo Qin Ge

Marco Polo Moreno de Souza, S. S. Vianna

We use a 1 GHz femtosecond laser as a tool to perform coherent spectroscopy in an atomic vapor. The action of the ultrashort pulse train over the various velocity groups or over a selective group of rubidium atoms is probed by a diode laser using velocity-selective or repetition rate spectroscopies. In particular, we show that the 1 GHz frequency separation of the modes in the frequency comb allows distinguishing of the different hyperfine levels within the Doppler broadened profile. The data are in good agreement with numerical and analytical results.

Elijah Ogaro Nyakang’o

Alfred Kastler