Vol. 44, Issue 1, pp. 55-67 (2014)

Abstract

The transmission characteristics for ⁸⁵Rb and ⁸⁷Rb laser-induced dichroism atomic filters operating on rubidium D₁ lines (795 nm) transitions are analyzed. By means of semiclassical density matrix equations of motion, a three-level model for the transmission characteristics of the ground state laser-induced dichroism atomic filter is presented. Calculative results show that this filter, using two counterpropagating pump and probe beams, can obtain higher transmission, narrower bandwidth and larger tuning capability than that using two copropagating pump and probe beams; with the aid of counterpropagating pump, the ⁸⁵Rb ground state laser-induced dichroism atomic filter can be more effective to achieve higher peak transmission (>34%) and larger tunability (>1 GHz) than the ⁸⁷Rb ground state laser-induced dichroism atomic filter in the same operation parameters. This result may be helpful for improving peak transmission (14.6%) of Rb ground state laser-induced dichroism atomic filter reported (Cerè A. et al., Opt. Lett. 34(7), 2009, pp. 1012–1014).