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Read and Write Characteristics of Stacked Volumetric Optical Disks with Blue Laser

A stacked volumetric optical disks (SVOD) system has been developed as one practical solution to achieve an over 1 Tbyte cartridge capacity using a commercialized drive and conventional recording layers. We have confirmed the read/write characteristics of thin optical disks in SVOD with a blue laser. Results were acceptable characteristics for practical use, similar to those obtained when we used a red laser. When a blue laser was set up in the SVOD system, a compact library with a 5 Tbyte cartridge, which can accommodate 100 disks, was achieved.