Effects of initialization conditions on erasability of phase change optical disks

Effects of initialization conditions of initialization power and number of initialization cycles on the recording properties of phase change optical disks were studied. It is found that initialization conditions affect erasability but have little effect on carrier-to-noise ratio of phase change optical disks. The initialization conditions also affect bias power margin. Erasability of more than 20 dB and carrier-to-noise ratio of 54 dB with 4 mW bias power margin were obtained by applying 6 mW of initialization power and 5 initialization cycles