Steady-state characteristics of a laser utilizing transmission gratings in crystals with a diffusion nonlinearity

A theory of a frequency-degenerate four-wave interaction in media with a nonlocal nonlinearity is used to calculate the steady-state energy characteristics of a laser utilizing transmission gratings, which are then compared with the results of a qualitative analysis of a system based on the holographic approach. It is shown that a suitable selection of the transparency of the resonator mirrors can ensure either highly efficient conversion of a pump beam into an output beam or into a beam with a reversed wave front.