Abstract

Frequency comb lasers provide a phase coherent link between radio frequency sources and optical frequencies, now making spectroscopy possible at optical and near-infrared frequencies at an extremely high accuracy of 10^-17 [1]. Using the comb laser for direct excitation obviates the need for a continuous wave laser at the transition wavelength, as has been demonstrated in beam experiments, vapour cells and magneto-optical traps [2-4].

© 2009 IEEE