[摘要]：Polarization properties of photon echo generated at the inter-combination transition (6s(2)) S-1(0) <-> (6s6p) P-3(1) of Yb-174 (transition of type 0 <-> 1) are for the first time investigatedexperimentally for a complete set of polarizations of two exciting pulses of resonant radiation (linear-linear, circularlinear, linear-circular, and circular-circular) in a pure ytterbium vapor. In all cases the photon echo polarization coincides with polarization of the second exciting pulse. Photon echo in a pure gas does not appear neither for exciting pulses of mutually orthogonal linear polarizations, nor for the pulses of opposite circular polarizations. Experimental results are in agreement with theoretical predictions. (C) 2011 by Astro Ltd. Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA
