Fully operational write-read-write and random-access optical store

A write-read-write magneto-optic memory for random access has been made to work as a feasibility model. The memory is an interim result of the development of a 107–108-bit memory. Design aspects and function of the memory as well as experimental results are summarized. Operation for more than 300 h and more than 109 read-write cycles has not given rise to any degradation.