Sony announces 405-nm laser
Today Nikkei Business Daily reported that Sony Shiroishi Semiconductor, one of Sony subsidiaries, finished the development of blue/violet laser prototype (405-nm wavelength). New laser can work for about 10,000 hours, features 50 mW output power at 70°C, enough for commercialization.
New gallium nitride semiconductor laser is grown on sapphire substrate and can generate rays with 2.3 side ratio (lower value indicates approaching to ideal circle; most competing developments feature about 3.0 ratio).
Now Sony plans to release players and optical drives, based on the new laser. The production might start after the summer of 2003.
Source: Nikkei Net
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