Crosstalk Cancellation for 50-GB/Layer Optical Recording

Abstract

The Mario Schenberg gravitational wave detector has been constructed at its site in the Physics Institute of the University of São Paulo as programmed by the Brazilian Graviton Project, under the full support of FAPESP (the São Paulo State Foundation for Research Support). We are preparing it for a first commissioning run of the spherical antenna at 4.2 K with three parametric transducers and an initial target sensitivity of h ∼ 2 × 10 −21 Hz −1/2 in a 60 Hz bandwidth around 3.2 kHz. Here we present the status of this project.PACS numbers: 04.80.Nn, 95.55.Ym

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.…”

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.…”