Abstract
Applications of time domain testing techniques which permit characterization of the media contributions to the performance of an MO channel are discussed; including both small (μm) scale phenomena appropriate to recording physics studies, and, larger (mm) scale phenomena appropriate to disk mapping and uniformity studies. Recording physics studies are described wherein the components of timing shifts in the channel due to properties of the media are characterized in terms of thermal, optical, and, magnetic crosstalk contributions. In this context laser power precompensation of edge positions is characterized. Timing jitters in the channel due to the properties of the media are characterized in terms of the noise contributions which limit performance, such as media and writing noises which scale linearly in the read power. Disk mapping studies are described wherein a software bit-error rate mapping technique is used to measure and characterize media defects.
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