  We discuss how the observation of Rabi flopping oscillations in a laser
cooled atomic sample could be used as a microwave power standard. The rubidium
atoms are first trapped in a standard MOT, then optically pumped, and dropped.
As they enter the interaction region, a resonant pulsed microwave field is
applied. Following the interaction lasting up to 10 ms, a probe laser beam is
turned on and the fluorescence measures the population inversion.
