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Compact confocal readout system for three-dimensional memories using a laser-feedback semiconductor laser

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Abstract

We present a compact confocal readout system for three-dimensional optical memories that uses the thresholding property of a semiconductor laser for feedback light. The system has higher axial resolution than a conventional confocal system with a pinhole. We demonstrate readout results for data recorded in two recording layers with the developed system.

© 2003 Optical Society of America

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