We present investigations of coherent population trapping (CPT) and Ramsey-CPT interrogations in laser-cooled 87Rb atoms towards the development of a cold atom-based clock.CPT and Ramsey-CPT interrogations are performed by turning off the magneto-optical trap (MOT) and allowing the atoms to freely expand. Ramsey-CPT interrogation is performed in the time-domain by delivering resonant Raman pulses to the atoms separated by a free evolution time which is determined by the atomic expansion time in our system. Our results show promise for improving the clock performance using this cold atom-based apparatus.
We are investigating coherent population trapping (CPT) and Ramsey-CPT interrogations in a cold atom system where the atomic beam originates from a pushed two-dimensional magneto-optical trap (2D+-MOT). Our results show promise for improving the performance of atomic clock using a cold atomic beam apparatus.
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