OPTIMIZATION OF GROOVE DEPTH FOR CROSS-TALK CANCELLATION IN THE SCHEME OF LAND-GROOVE RECORDING IN MAGNETOOPTIC DISK SYSTEMS

In the scheme of land-groove recording in magneto-optic disk data-stor age systems, it has been shown that an optimum groove depth exists at which the cross talk from adjacent tracks diminishes. Cross-talk cance llation, however, is very sensitive to various parameters of the syste m, and, in particular, the presence of substrate birefringence can hav e devastating effects on system performance, We analyze the origin of the observed effects by using scalar diffraction theory, and we show t he reasons behind cross-talk cancellation. We also explain the relatio n between substrate birefringence and cross talk in simple analytical terms. Extensive computer simulations have been performed to verify an d extend the theoretical results of this paper; the results of some of these simulations are also presented. (C) 1996 Optical Society of Ame rica