Abstract
Experimental measurements of diffraction efficiencies for holographic transmission gratings have been performed. The transmitted intensity distribution is characterized by an overall efficiency of about 10% into first order and a strong resonance enhancement, up to 20% efficiency, around the region of anomalous dispersion. The intensity distribution is well described by a grating model which predicts the overall efficiency, as well as the detailed behavior of the grating around the regions of anomalous dispersion. The model can be used to predict the efficiencies for an arbitrary grating material and thickness, and thus aid in the determination of grating structure for a specific experimental application.
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