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Increased data density and media capacity is a constant goal of research into optical storage. These‐dimensional optical storage offers this large increase because the volume density limit is 1/λ3 rather than the 1/λ2 achievable with 2‐D storage. Holographic storage and spectral hole burning have been examined in the past; here an alternative is presented based on two‐photon excitation.
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Strickler et al. (1993) studied this question.
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