Polarization effects in photon echoes and in an anisotropic laser cavity.

I. V. Evseev, Решетов Владимир Александрович

Valerii S Zapasskii, G. G. Kozlov

Igor V. Yevseyev, Valery M. Yermachenko

Решетов Владимир Александрович, Е. Н. Попов

In this article it was described collision induced photon echo, which is formed by two laser pulses with orthogonal polarizations on the transition with the angular momentum change 0 1. The dependence of the echos intensity versus the ellipticity of laser pulses was found. It was shown that echos intensity has maximum provided that laser pulses are linear and up to zero for circular orthogonal polarization. It was found reduction effect of photon echos signal in longitudinal magnetic field. This effect may be used for measuring the relaxation rates due to such collisions.

Н. Н. Рубцова, Sergei A. Kochubei, В. Н. Ищенко +2 more

Isotropic depolarizing collisions are studied using a stimulated photon echo with a specific polarization of the excitation radiation pulses in a mixture of ytterbium with krypton for the J = 1 ⇄ J = 0 transition of 174Yb. The difference between the relaxation rates of orientation and alignment γ (2) − γ (1) of the 3 P 1(6s6p) 174Yb level is measured as a function of the krypton pressure. The collision photon echo at the J = 1 ⇄ J = 0 transition induced by the anisotropic relaxation is studied for the Yb + Xe mixture. The power of the collision echo increases from zero with the addition of a buffer gas to ytterbium, reaches an optimal level, and decreases with an increase in the buffer gas pressure. The polarization of this collision-induced echo differs from the polarization of the conventional echo. The experimental results are in qualitative agreement with theoretical predictions.

C. V. Heer, Ronald H. Kohl