Multi-Layer Worm Disk with Parallel Recording and Read-Out for High Capacity Storage
Abstract
Technology has been developed to enable recording and reading of optical disks having many layers. The approach selected relies on recording bits in a volume by using single beam two-photon recording. A volumetric bit is written in the volume of a molded photochromic dispersed organic polymer only at spatial locations where the recording beam has sufficient photon energy. Data recording is based on two-photon absorption, by which one molecule is excited into a higher state by absorbing the combined energy of two photons. Under this program, the following key sub-system components were developed: (a) Materials with high sensitivity and transparency that can be fabricated into a disk form. (b) Recording and read-out heads that are capable of parallel operation while minimizing interlayer cross-talk. (c) Focus and tracking servo systems that position the heads over the desired data track and layer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2003
- Accession Number
- ADA413850
Entities
People
- D. Dvornikov
- Ernest M. Walker
- P. Rentzepis
- S. Esener