Green Laser Diodes from Osram

Projection
Direct green laser diodes are an important step toward
powerful embedded projectors. The laborious way of
producing green light by doubling the frequency of infrared
laser is no longer needed. In particular, pico projectors
based on MEMS mirror (micro-electromechanical system)
will benefit from the small size and the high beam quality of
the single mode lasers. The laser diodes produce the right
green wavelength for projection and offer a sufficient
efficiency of typically 5-6% for battery driven applications.


http://www.osram-os.com/media/resource/HIRES/345801/812603/direct-green-laser-diodes.pdf