Magnetic effects on polarization of spontaneous emission from lower laser levels

J.R. Bupp, C. V. Heer

T. Yabuzaki, Toru Ogawa

Double resonance phenomena of a gaseous laser in the spontaneous emission from the lower laser level is studied, especially for the case of the He-Ne laser operating at 0.633 µm-π transitions. Magnetic resonances of the laser levels 3 s 2 and 2 p 4 of neon make the intensity of the 0.609 µm line from the 2 p 4 level increased and decreased, respectively, and can be observed even when the g -factors of these levels are the same. The linewidths of the resonance lines depend only upon the relaxation of alignment.

Emilia A. Alipieva, V. N. Grigoreva, P. R. Karavassilev +1 more

Yevgeny V. Radeonychev, Olga A. Kocharovskaya

Summary form only given. In three-level atoms the drastic modification of the decay rates by the driving field may occur in the free space as soon as one dynamic Stark level crosses a neighboring unperturbed atomic energy state. This leads to appearance of spontaneous emission from the former ground state to the lower dynamic Stark level or spontaneous decay from the upper dynamic Stark level to the excited atomic state. For an experimental realization we propose to use a cell with potassium (/sup 39/K) vapor in magnetic field driven on D1-transition by circular polarized radiation of Ti:sapphire or dye laser.

Ali Mortezapour, Majid Abedi, Mohammad Mahmoudi +1 more

The effect of a coupling laser field on the entanglement of a three-level quantum system and its spontaneous emission is investigated via the reduced quantum entropy.We consider two schemes: the upper-and lower-level couplings.By calculating the degree of entanglement (DEM) for both systems, it is shown that the entanglement between the atom and its spontaneous emission can be controlled by the coupling laser field.This field, however, affects the entanglement differently in the two schemes; it is only the lower-level coupling scheme that shows a non-zero steady state DEM which can be controlled by the intensity and detuning of the coupling laser field.

N. B. Abraham, E. Arimondo, Maxi San Miguel