Optical Pumping Investigation of Atomic Interactions

Alexander Ya. Kazakov

If an atom interacts with a classical field and quantized mode simultaneously, exchange by photons between the different components of the field is possible. Such systems can be exploited in order to generate radiation in the quantized mode and can be considered as a micromaser with optical pumping. The process of generation of the quantized field and the quantum-statistical characteristics of this radiation are under investigation.

Evgenii B. Aleksandrov, N. N. Yakobson

Evgenii B. Aleksandrov, N. N. Yakobson

Hossein Davoodi Yeganeh

Optical pumping is a process used in physics and quantum mechanics to manipulate the energy levels of atoms or ions using light.It involves the absorption and emission of photons by atoms, which can change their electronic configurations and energy states.In this paper, optical pumping with Liouville equation approach is used to investigate optical pumping in alkali atoms.For this purpose, circularly polarized light is applied to the atomic system, which causes a transition between atomic sublevels and changes the population of sublevels.Also effect of relaxation and repopulation are considered in the evolution of the population sublevels.Here, we use optical pumping with Liouville equation approach for investigation of population evolution in Cesium atom.

V. L. Jacobs

Daniel S. Elliott

Abstract : In this research program, the investigators have explored the role of fluctuations of a laser field on coherent interactions between the laser field and simple atomic systems. A key feature of these experiments is their ability to provide measurements of complex nonlinear optical interactions which are sufficient for direct, quantitative comparison with theory. The main thrust of the present work has been the study of non-Markovian field statistics, present in experiments that use multiple, time-delayed input beams to drive the nonlinear system. The specific interaction studied was Phase-Conjugate Four-Wave Mixing in an optically-pumped beam of atomic sodium, which the researchers measured as a function of laser bandwidth, Rabi frequency, and delay time between the pump and probe beams. The investigators have also calculated the expected signal strength through numerical integration of the Optical Bloch Equations. Experimental and numerical results are in very good agreement. The investigators also studied theoretically two-photon absorption with correlated, time-delayed input fields, and provided the first experimental confirmation of the fundamental theory of Phase-Conjugate Four-Wave Mixing with monochromatic fields in a simple atomic system.