Researchers at Sony together with those at Japan's Tohoku University said they have developed a blue-violet laser that can create 1TB Blu-ray discs. The ultrafast pulsed semiconductor laser has a laser wavelength of 405 nanometers and can generate optical pulses just the picoseconds in duration. Moreover, the new laser doesn't require a large light source and a specialist technician to operate, as required in the past with similar technology.
