Abstract

Optical-spot size is one of the key parameters for optical-disk storage devices. With larger spot size, more power is required to write a mark, the tracking error signal is smaller, the adjacent track interference is higher, and the resolution and signal amplitude are lower. In addition, based on experimental results, defocus was found to greatly increase peak shift. All things considered, spot size has a major role in determining raw error rates.

© 1991 Optical Society of America