Year: 2003
Type: article
Abstract: A novel high-capacity holographic read-only-memory (ROM) disc system is proposed that stores multiple disc-sized data patterns as multiplexed holograms within a single holographic disc using a conical reference beam for rotational symmetry during recording, with continuous serial readout during playback. Estimates predict user-data capacities of 100 GB or more in a 12 cm disc, with replication speeds of a minute or less, using current holographic media parameters and high-power lasers. A method for fabricating transmissive metallic disc-sized data masks is developed and confirmed experimentally for features down to 0.4 µm, through a variation of the optical disc mastering process. The retrieval of raw holographic eye-patterns at a rotation speed of 1000 rpm without the use of servos is demonstrated for linear densities of 0.67 µm per channel bit with EFMPlus channel coding.
DOI: 10.1143/jjap.42.976
Institution: Sony (Japan)
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1982187650