Laser-Written Glass Could Preserve Terabytes of Data for Over 10,000 Years

Details

Researchers have demonstrated a glass-based storage system designed for extremely long-term digital archives. Instead of storing information with magnetic changes or electronic cells, the system uses extremely short laser pulses to create tiny data structures inside glass. The demonstrated sample is a 120 millimeter square piece of glass only 2 millimeters thick, with a capacity of 4.8 terabytes spread across hundreds of layers. That is enough space for a very large digital archive in a relatively small piece of material. The more important feature is longevity. Accelerated aging tests on the written structures in borosilicate glass suggest that stored information could remain readable for more than 10,000 years. The newer approach also matters because it moves beyond expensive fused silica toward borosilicate glass, a more common type of glass, while reducing the complexity of the equipment used to write and read the data. This makes the technology more promising for archival storage, where information may be written once and preserved for very long periods rather than constantly updated. It is not intended to replace everyday solid-state storage, and the system remains a specialized research technology. Its potential value is in keeping important records, cultural material, scientific information, and other data available for generations without repeatedly transferring it to new storage media.