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The reversible optical recording of FM video signals is reported. The recording medium is based upon the amorphous-to-crystalline phase transition of pure tellurium, incorporated into a trilayer antireflection structure. In excess of 50 record/erase cycles have been demonstrated, with no significant degradation in playback signal quality or erasability. The irreversible process of ablative pit formation (hole opening) has been inhibited by the use of a silicon dioxide capping layer.
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Bell et al. (1981) studied this question.
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