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Illumination & Displays

'Forgotten' laser material aimed at projector use

Optics.org
14 September 2010

The requirements of high power and longer wavelength that have made the development of picoprojectors for mobile phone and other applications a challenge may be close to being fulfilled.

The solution requires a laser with a lower threshold current, and it now looks like this could be achieved by switching to a family of II-VI semiconductor materials based on the alloy BeZnCdSe. Using this approach, a team from Sony, Hitachi and Japan's National Institute of Advanced Industrial Science and Technology (AIST) has just reported a low-threshold-current laser that emits 1.5 mW at 545 nm.

II-VI lasers are certainly not new. But innovations -- including the one above -- by several companies have created new excitement for green laser diodes.

Full story from Optics.org
Green lasers in action (SPIE Newsroom, June 2010)
Pinhole Cinema: Pico projectors take the floor (SPIE Newsroom, June 2010)