本文考虑了晶体的各向异性特点,导出了光折变晶体中的体全息光栅光衍射的耦合波方程,给出了方程的解.用本文的公式还可以解释光线非对称入射时的实验结果.

The coupled wave equation for light diffraction from volume hologram grating in photorefractive crystals are derived by carefully considered the anisotropio nature of crystals. The solutions of these equations are also obtained. With the formulas in this paper, the results of experiment in which the two incident beams are asymmetrical can be explained.