New Blu-Ray Lasers Mean Faster Burns, Quad-Layer Discs

This week, Sony launched the first commercial 400mW blue?violet laser diode for Blu-ray. The higher-power lasers can perform triple or even quadruple-layer recording at 8X-12X speeds, storing up to 128GB on a single disc.
Sony’s blue-violet laser diode, called the SLD3237VF, will cost about $12. Until the

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