A general theory of two-wave mixing in nonlinear media is presented. Assuming a gain (or absorption) grating and a refractive index grating are generated because of the nonlinear process in a nonlinear medium, the coupled-wave equations of two-wave mixing are derived based on the Maxwell’s wave equation. The coupled-wave equations can be decoupled as coupled-equations for the intensity and coupled-equations for the phase of both beams, and these two sets of coupled-equations can be solved analytically by using average total intensity in the medium instead of the total intensity. Compared to the previous theory of two-wave mixing, the theory presented here is more general and the application of the theory to the photorefractive materials, Kerr media and semiconductor broad-area amplifiers are described.
|Journal||Optical Society of America. Journal B: Optical Physics|
|Publication status||Published - 2009|
- semiconductor amplifier
- Kerr media
- Two wave mixing