  The electrical polarization of the laser crystal by external electrical field
can change significantly the output laser parameters such as wavelength of
excitation and generation, spectral bandwidth, excitation and emission
cross-sections, efficiency and so on. That can give new possibilities for wide
control of these parameters, increase their range for existing lasers and
create a new line of the laser devices. In this paper the direct impact of
external electrical fields on the laser solid state gain media was estimated
using as an example Ti:Sapphire crystal. It was demonstrated that metal-ligands
distances displacement in this crystal under external electrical field of
20kV/cm can be comparable to that caused by mechanical pressure of 150 kbar,
which was previously measured in experiments. The consequences of these
displacements on the excitation and luminescence properties of the crystal are
also discussed.
