Read/Write Technology for 50 GB/layer at 100 Mbps

Abstract

We developed read/write technology for high-density optical data storage of 50 GB/layer at a data transfer rate of 108 Mbps. We demonstrated the writing and reading capabilities of a 50 GB/layer optical disk recording system at 36 Mbps with a sufficient power margin, using a three-beam crosstalk canceller with optical response equalizers, using a phase-change write-once disk. Bit error rates were below 1×10-4 at 108 Mbps. Experimental results showed that the technology realizes writing and reading densities two times higher and data transfer rates three times higher than those of Blu-ray with a simple optical component such as Blu-ray.

Layer-Selection-Type Recordable Optical Disk with Inorganic Electrochromic Film

“…The results in §3.5 were used to estimate the potential storage capacity of a layer-selection-type recordable optical disk. The data capacity was assumed to be 50 GB/layer because the technology to write and read such a capacity has already been developed 8,9) and is applicable to an LS-R.…”

33.4 Gbyte/Layer Recording with Adaptive Write Strategy for 100 Gbyte Rewritable Triple-Layer Disc

“…It was reported that over 30 Gbyte/layer recording is possible with the PRð1; 2; 2; 2; 1ÞML method. 1,2) Multilayer recording is another solution for achieving large capacity. In multilayer recording, however, optical disc technology of more than 100 Gbyte was reported, which was a write-once type media.…”

High-Speed Write/Read Techniques for Blu-ray Write-Once Discs

“…4) By enhancing this method, 5) 50-GB-per-layer highdensity recording has been successfully demonstrated. 6,7) We have recently reported that a good power margin of more than AE10% was obtained at 6Â write/read speed using a conventional PRML method on a phase-change Blu-ray write-once disc. 8,9) The rotation speed of 16Â digital versatile disc (DVD) is about 10,000 rpm, which is a stable rotation speed limit.…”