A wide-aperture Pockels cell with three ring electrodes

Light Scattering in KDP Crystals and Relaxation Oscillations of Diffusion Layer in Crystal Growth from Solutions

“…Therefore, to reduce the oscillation amplitude d of relative supersaturation and hence the danger of rough step bunch formation, one should choose the minimum possible feeding period T and the maximum relative feeder width s. Of course, the proposed model does not reflect complexity of real hydrodynamic and diffusion flows in the crystallizer; specific forms of the plots in Fig. (5) markedly depend on the geometry and size of a growth chamber.…”

“…Let the velocity U of the outflow from the feeder vary in time by the law shown in Fig. (5). The relative supersaturations 1 and 2 correspond to relative supersaturations for continuous solution flows with maximum and minimum velocities U max and U min , and min and max are the corresponding diffusion layer thicknesses .…”

“…The solution supersaturation on the surface will vary by the law represented qualitatively in Fig. (5). Let us find the values of maximum max and minimum min with respect to relative supersaturations and the duty cycle of feeding s = t f /T.…”

“…High optical quality of crystals (specifically of KDP monocrystals) grown from solution is still an important problem. It is closely connected with the development of new efficient techniques [1][2][3] of crystal growth and increased demands to the quality of crystals to be used, for example, in high-power lasers [4][5][6]. The main quality indexes, such as optical transparency, optical homogeneity, and laser breakdown threshold are related to growth perfection.…”