Numerical analysis of readout-signal cross talk in magneto-optical land and groove recording

摘要

The effects of recorded marks, groove geometry, and aberrations on readout-signal cross talk are numerically analyzed in magneto-optical land and groove recording, with an application of scalar diffraction theory. Three simple patterns of recorded marks are considered, and each of them consists of three tracks that respectively have three marks of a single frequency. Cross talk as a function of groove depth is calculated at the edges, as well as at the center, of a mark in the center track for each frequency. The groove-depth ranges over which cross talk is less than -30 dB are obtained for each pattern. (C) 1997 Optical Society of America.