Multi-Level Coding for Optical Storage
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29
There is a monotonic dependence of the magnitude of the readback signal from optical recording material on the bias magnetic field H and the laser write power P used to write domains. The precise mechanisms for these dependencies are still under investigation, but the former probably results from a variation in the net magnetization of the illuminated regions when different bias fields are used. The laser power dependence is most likely due to the writing of larger or smaller domains.