Predictive aberration correction for multilayer optical data storage

Applied Physics Letters, Vol. 88, 19 January 2006, 031109. M.J. Booth, M. Schwertner, T. Wilson, M. Nakano, Y. Kawata, M. Nakabayashi & S Miyata

The recording of data in multiple layers, rather than a single layer, permits a significant increase in

the capacity of optical data storage devices. However, focusing to the different layers introduces

different amounts of depth-dependent aberrations. Variable aberration correction is therefore

necessary to maintain diffraction-limited operation. We demonstrate the use of adaptive optics to

predict and correct these aberrations for both the recording and read-out of such media.

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