V. A. Zuikov

Multichannel information processing in the optical echo-processors on the basis of Van-Fleck paramagnet crystals

The analysis of various modes of multichannel information recording and readout in conditions of a stimulated (accumulated and long-living) photon echo in the crystals doped with rare earth ions which are known as Van-Fleck paramagnets has been performed in order to utilize them in the operation of low-temperature optical echo-processors.

Formation of photonic echo signals in the presents of a strong concentration quenching effect

The connection between the photonic echo formation in crystals doped by rare-earth elements and the concentration effects was studied. The application of optical echo spectroscopy in studies of garnet crystals with a high content of thulium impurity was demonstrated. By the example of activated crystals of ruby and lanthanum trifluoride, the spectral transformation of the photonic echo signals was analyzed in the present of the concentration quenching effect.

Optical superradiance in a Pr{sup 3+}:LaF{sub 3} crystal

Optical superradiance was experimentally obtained for the first time on the 3P0?3H4(0) transition in a Van Vleck paramagnet ? a Pr3+:LaF3 crystal. Superradiance at a wavelength of 477.7 nm was emitted by a sample 8 mm long, with resonant absorption coefficient ?=4.7 cm-1, excited by 10-ns laser pulses at a temperature of 2.2 K.