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Sumitomo Electronics Develops “Pure” Green Laser Diode

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Sumitomo Electrics is proud to announce that they are the first company to design what they consider a (pure) green laser diode. What makes the laser light “pure” is a new development in the diode that allows it to remain at the 531nm wavelength that is needed to produce the green color. Older versions of green and blue lasers uses a material called Gallium nitride (GAN). This material produces a phenomenon where the luminance efficiency shows a rapid decline with increasing wavelength. The increased wavelength throws the laser out of the color’s range, which is why the company doesn’t consider older lasers “pure.” The pure-green laser diodes will soon be mass produced and are expected to be integrated into pico projectors and other laser using electronics.

[via Gizmdo]

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