Six-wave radiation converter on thermal nonlinearity in the scheme with codirectional pumping waves

The spatial selectivity of six-wave radiation converter on thermal nonlinearity in the scheme with codirectional pumping waves has been investigated at nonstationary regime and stationary regime. The influence of thickness of a nonlinear medium, angle of incidence of pumping waves and wave numbers of pumping waves on the bandwidth of spatial frequencies of six-wave converter has been analyzed. The comparison of the spatial selectivity between four-wave radiation converter and six-wave radiation converter has been made.