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The perfect data storage solution should offer fast access to data, maintain data in the absence of external power, and be able to withstand large numbers of read–write cycles. Phase-change random access memory (PCRAM), a type of non-volatile memory that uses the amorphous and crystalline states of phase-change materials for encoding data, can satisfy all of these criteria

German scientists of Karlsruhe Institute of Technology have succeeded in encoding data at a rate of 26 terabits per second on a single laser beam, transmitting them over a distance of 50 km, and decoding them successfully. This is the largest data volume ever transported on a laser beam. The process developed by KIT allows to transmit the contents of 700 DVDs in one second only.