Abstract: The present invention includes a method and apparatus for reducing the width of a mark written in optical media. When forming a long mark, the prior art recording methods typically cause blooming at the edges of the mark, resulting in a wide mark pattern which may be sensed by the read focused spot reading an adjacent track causing increased adjacent track crosstalk (ATC). However, by removing every other pulse from the write pulse waveform, the cooling sequence of the writing process is sufficiently increased to allow for additional cooling between pulses. When forming marks with less pulses, the effects of blooming are substantially reduced. Thus, because of the reduction in the effect of blooming, the problems associated with ATC, whereby adjacent track information is recorded, is substantially reduced.

Abstract: The present invention includes a method and apparatus for reducing the width of a mark written in optical media. When forming a long mark, the prior art recording methods typically cause blooming at the edges of the mark, resulting in a wide mark pattern which may be sensed by the read focused spot reading an adjacent track causing increased adjacent track crosstalk (ATC). However, by removing every other pulse from the write pulse waveform, the cooling sequence of the writing process is sufficiently increased to allow for additional cooling between pulses. When forming marks with less pulses, the effects of blooming are substantially reduced. Thus, because of the reduction in the effect of blooming, the problems associated with ATC, whereby adjacent track information is recorded, is substantially reduced.

Abstract: The present invention includes a method and apparatus for reducing the signal amplitude in long marks which are written into optical disks. When forming a long mark, an increased signal amplitude is typically caused by the blooming toward the end of the mark, and is often sensed by the focused spot in the adjacent track causing increased adjacent track crosstalk (ATC). However, when forming short marks, the effect of blooming is minimized. Therefore, by splitting a long mark into a sequence of short period marks, with short period spaces (1T) between each short period mark, the effect of blooming is substantially reduced.