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Nonlinear magneto-optical resonances at D1 excitation of 85 Rb for partially resolved

Summary: Nonlinear magneto-optical resonances at D1 excitation of 85
Rb and 87
Rb for partially resolved
hyperfine F levels
M. Auzinsh,* R. Ferber, F. Gahbauer, A. Jarmola, and L. Kalvans
Laser Centre, The University of Latvia, 19 Rainis Boulevard, LV-1586 Riga, Latvia
Received 4 March 2009; published 6 May 2009
Experimental signals of nonlinear magneto-optical resonances at D1 excitation of natural rubidium in a
vapor cell have been obtained and described with experimental accuracy by a detailed theoretical model based
on the optical Bloch equations. The D1 transition of rubidium is a challenging system to analyze theoretically
because it contains transitions that are only partially resolved under Doppler broadening. The theoretical model
took into account all nearby transitions, the coherence properties of the exciting laser radiation, and the mixing
of magnetic sublevels in an external magnetic field and also included averaging over the Doppler profile. The
experimental signals were reproduced very well at each hyperfine transition and over a wide range of laser
power densities, beam diameters, and laser detunings from the exact transition frequency. The bright resonance
expected at the Fg=1Fe=2 transition of 87
Rb has been observed. A bright resonance was observed at the
Fg=2Fe=3 transition of 85
Rb, but displaced from the exact position of the transition due to the influence of
the nearby Fg=2Fe=2 transition, which is a dark resonance whose contrast is almost 2 orders of magnitude


Source: Auzinsh, Marcis - Department of Physics, University of Latvia


Collections: Physics