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Laser frequency stabilization to excited state transitions using electromagnetically induced transparency in a cascade system.

By R.P. Abel, A.K. Mohapatra, M.G. Bason, J.D. Pritchard, K.J. Weatherill, U. Raitzsch and C.S. Adams

Abstract

We demonstrate laser frequency stabilization to excited state transitions using cascade electromagnetically induced transparency. Using a room temperature Rb vapor cell as a reference, we stabilize a first diode laser to the D2 transition and a second laser to a transition from the intermediate 5P3/2 state to a highly excited state with principal quantum number n = 19–70. A combined laser linewidth of 280±50 kHz over a 100 μs time period is achieved. This method may be applied generally to any cascade system and allows laser stabilization to an atomic reference in the absence of a direct absorption signal

Publisher: American Institute of Physics
Year: 2009
DOI identifier: 10.1063/1.3086305
OAI identifier: oai:dro.dur.ac.uk.OAI2:7396
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