CrunchGear: A new blue laser diode, developed by Sanyo, could help increase the capacity of Blu-ray discs. Even if it does, however, we’re still a few years away from seeing any such discs.
The new diode emits a beam of 450 milliwatts, which would be powerful enough to write onto two additional data layers on a Blu-ray disc. While current Blu-ray discs max out at two, 25GB layers, discs produced using this new Sanyo diode would see their capacity double—four, 25GB layers adding up to a total capacity of 100GB per disc.
Write speeds would also increase, moving up to 12X. That means you’d be able to write an entire disc in just 10 minutes.