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Method to Increase Readback Signal-To-Noise Ratio From Optical Disk

IP.com Disclosure Number: IPCOM000035345D
Original Publication Date: 1989-Jul-01
Included in the Prior Art Database: 2005-Jan-28

Publishing Venue

IBM

Related People

Authors:
Jipson, V Rubin, K Rugar, D [+details]

Abstract

Described herein is a layered disk structure for optical storage which increases the signal-to-noise ratio for shot noise limited media without significantly increasing the required data recording laser power. A heat sink layer is provided which desensitizes the media and allows more readback photons to be incident on the disk without erasing the recorded data. The heat sink is partially thermally isolated from the recording layer to reduce the effect of the heat sink during data recording pulses, which are shorter than reading pulses.