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Published on: November 11, 2013
Observation of query pulse length dependent Ramsey interference in rubidium vapor using pulsed Raman excitation
G S Pati1, F K Fatemi, M S Shahriar
1Department of Physics and Pre-Engineering, Delaware State University, Dover, Delaware 19901, USA. gspati@desu.edu
Abstract:
We report observation of query pulse length dependent Ramsey interference (QPLD-RI), using pulsed Raman excitation in rubidium vapor. This is observed when a long, attenuated query pulse is used during pulsed Raman excitation. We explain the physical mechanism behind the QPLD-RI using a Bloch vector model. We also use numerical solutions to time-dependent density matrix equations to simulate this interference effect, showing qualitative agreement with experimental results. Presence of such interference could create a potential source of error in a vapor cell Raman clock constructed using frequency-domain Ramsey interference (FDRI).
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