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A method for computing the diffraction efficiency of photochromic, transmission holographic gratings is developed. The nonuniform exposure through the depth of the material is taken into account. The efficiency depends strongly on the modulation of the refractive index. The diffraction efficiency of some typical photochromic gratings is calculated, and efficiencies of up to 10% are predicted.
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Dorian Kermisch (1971) studied this question.
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