Abstract
Persistent spectral hole-burning (PHB) permits use of the optical frequency for encoding digital information through the presence and absence of spectral holes that are burned in inhomogeneously broadened absorption lines at low temperatures. The combination of spectral and spatial data recording can make storage densities of 1010 bits/cm2 possible. The most challenging innovation needed to achieve a practical storage system is presented by the complex materials requirements1 on a successful storage medium.
© 1986 Optical Society of America
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