NUMERICAL-ANALYSIS OF READOUT-SIGNAL CROSS-TALK IN MAGNETOOPTICAL LAND AND GROOVE RECORDING

The effects of recorded marks, groove geometry, and aberrations on rea dout-signal cross talk are numerically analyzed in magneto-optical lan d and groove recording, with an application of scalar diffraction theo ry. Three simple patterns of recorded marks are considered, and each o f them consists of three tracks that respectively have three marks of a single frequency. Cross talk as a function of groove depth is calcul ated at the edges, as well as at the center, of a mark in the center t rack for each frequency. The groove-depth ranges over which cross talk is less than -30 dB are obtained for each pattern. (C) 1997 Optical S ociety of America.