Abstract
Theoretical and experimental investigations are reported on spatial frequency doubling of holographic gratings, recorded with two linear orthogonal polarizations in dyesensitized dichromated gelatin. This frequency doubling is caused by photoinduced isotropic changes in the optical parameters of the material that depend on the polarization state of the irradiating light. The dependence of the diffraction efficiency on the composition, exposure and spatial frequency of the recorded gratings is investigated in detail.
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