ANALYSIS OF LEADING-EDGE TRAILING EDGE INDEPENDENT DETECTION METHOD IN OPTICAL DISK

The effects of independent detection of leading edge/trailing edge on edge-shift and jitter are investigated for typical heat-mode recording processes using read-out pulse width, recording timing measurements a nd thermal simulation. In addition, in order to investigate the edge-s hift reduction limit for this new method, a method is proposed to anal yze what causes the edge-shifts; it statistically evaluates the relati ve edge intervals between adjacent edges of a particular worst-case re cording pattern. Our results clarify that the new method is effective for reducing edge-shifts and jitter.