Aleksei A. Kuznetsov

Lens effect in the waveguide gas laser

The radiation field of a planar waveguide laser with a nonuniformly heated gas causing the lens effect was studied. Conditions were found at which the losses at the walls and nonlinearity of the active medium (saturation) became essential. Calculations of the lasing of a xenon laser were performed with regard for the concurrence of modes. The radiation field distributions in the near and far diffraction zones were calculated. The results of calculations correlate qualitatively with experimental data.

Feedback in devices utilizing optically controlled spatial modulators

A description is given of a number of optical devices which can be used in interferometry, holography, and optical information processing. Feedback in an optically controlled spatial modulator makes it possible to stabilize the intensity of laser radiation (temporally and spatially), to make an intensity modulator, and to perform image filtering. Probably the most interesting is the realization of a dynamic memory which, in particular, can be used to convert an image into binary form. An important use for devices with feedback is to solve equations of mathematical physics.