Locking of a long-lived photon echo in a nonuniform electric field

Guzel I. Garnaeva, Leonid A. Nefediev, É. I. Khakimzyanova

А. А. Калачев, D.D. Vlasova, Vitali V. Samartsev

Шегеда Анатолий Михайлович, B. M. Khabibullin, V. N. Lisin +2 more

A strong decreasing of the intensity of the inverse 2-pulse, 3-pulse and long lived 3-pulse photon echo was observed when a current pulse passed through the strip evaporated onto the surface of the sample (current pulse was applied before or after the laser pulses). The strip is heated by the current pulse and there is the voltage difference at the ends of the strip. The voltage difference creates instantly the nonuniform electric field in the region of optical excitation so the echo intensity is decreased by the short-lived nonuniform line width rise. The line width rise is differentiated for the distinct type ion sites in the LaF3 unit cell. The strip current-heating gives rise to a phonon pulse. When phonon pulse reaches the optically excited volume it causes the shift of energy levels of Pr3+ ions, effecting a phase accumulation and the echo intensity change as a consequence.

Ildus S. Bikbov, I. V. Evseev, I. I. Popov +2 more

N. W. Carlson, William Randall Babbitt, Yu Bai +1 more

L. A. Nefedev, Э. И. Низамова, Guzel I. Garnaeva

The frequency–time correlation of inhomogeneous broadening on different transitions in a threelevel resonant medium in the presence of external spatially nonuniform electric fields is considered. It is shown that, under a certain relationship between the magnitudes of gradients of external nonuniform electric fields acting at different moments of time, it is possible to control the magnitude of the frequency–time correlation on different frequency transitions. An increase in the frequency–time correlation coefficient with certain strengths of external spatially nonuniform electric fields leads to the recovery of the phase memory of the system and an increase in the stimulated photon echo intensity.