High-Speed Recording Performance of Metal Azo Dye Containing Digital Video Disc-Recordable Discs

We have studied the high-speed performance at speeds of 3.5 m/s–14.0 m/s of digital video disc recordable (DVD-R) discs which contain metal azo dyes. Good recording sensitivity and good mark jitter with carrier-to-noise ratio (C/N) > 50 dB at mark lengths of less than 0.40 µm were demonstrated at over 10 m/s due to the high recording responses of the dyes. Furthermore, by introducing the write strategy with pulse trains, the sensitivity difference between mark lengths could be completely eliminated and excellent recording with a jitter value of 8% level has been achieved at 7.0 m/s with a minimum mark length of around 0.4 µm.