MATRIXING COUPLED-WAVE THEORY OF PHOTOREFRACTIVE HOLOGRAM RECORDED BY2-BEAM COUPLING

In a volume phase hologram recorded by two-beam coupling in photorefra ctive crystal, the refractive index modulation and the phase shift are both path dependent. In this paper, the concept of dividing the cryst al slab into layers together with the mathematics of the diagonalizati on matrix are developed to calculate the diffraction of the hologram. As a result, a general analytic solution is achieved. For the use of n ovelty filtering in image processing and interferometric measurement, the conditions for keeping the same fields of the reconstructed signal beam and the transmitted signal beam are discussed.