Photon echoes in Cs vapour

F. de Rougemont, J. Keller, J.-L. Le Gouët

T Baer, Isaac D. Abella

F. de Rougemont, J. Keller, J. L. Le Gouë

Н. Н. Рубцова, Гольдорт Вениамин Гершевич, В. Н. Ищенко +3 more

Our research into photon echo (PE) and stimulated photon echo (SPE) in ytterbium vapour at the transition 0 ↔ 1 is summarized. We present the polarization properties of PE and SPE in pure gas, anisotropy of collision relaxation, collision-induced PE and collision-induced SPE.

Н. Н. Рубцова, Хворостов Евгений Борисович, Sergei A. Kochubei +2 more

Collision induced photon echo is observed in ytterbium vapour at the inter-combination transition (6s6p) 3P1 ↔ (6s2) 1S0 in the presence of Kr gas as buffer. Collision echo is generated by two unidirectional resonant dye laser pulses of linear mutually orthogonal polarizations. There is practically no echo in the absence of buffer. Photon echo power increases with Kr pressure in the range from 0 to 20 mTorr and decreases at higher Kr pressures. Experimental results are compared with theoretical predictions accounting for relaxation matrix dependence on the direction of the velocity of active atoms.

Maria Maragkou