Exact solution to the forward degenerate four-wave mixing intransmission geometry in photo refractive media

A method for exact solution to forward degenerate four-wave mixing in transmission geometry for photo refractive media is presented. The effects of pump depletion and light absorption in the nonlinear dynamic media are taken into account. The energy transfer curves are obtained, and the concvision is compared with previous result in the case of pump light to be constant.