10 Watts Peak Power in 635nm eVCSEL Laser

Principia Lightworks, Inc., Woodland Hills, CA has announced a breakthrough of over 10 watts of peak output power at 635nm using their proprietary electron beam pumped semiconductor laser (“eVCSEL”).    The eVCSEL uses a tightly focused scanning electron beam to pump a multiple quantum well laser consisting of III-V semiconductor compounds.  Device efficiency is approximately 10 percent of electron beam power to optical power.

The electron beam can scan any arbitrary area diced from a 3 inch diameter GaAs growth substrate.  The current eVCSEL lasers slated for professional projection display applications are 2 cm x 1 cm.  0.9 cm x 0.5 cm dimensions will be used for laser based consumer television.  The emitted light has a polarization ratio of 1000:1 with a 6 degree half angle for highly efficient optical coupling.   The eVCSEL has a distinct advantage in that device production costs are extremely low given the simplicity of a cathode ray tube as well as a worldwide manufacturing infrastructure of a well known and proven technology. 

Principia’s technology platform can engineered to produce wavelengths from UVA through the visible utilizing II-VI based semiconductors. The company has also demonstrated blue and green lasers at 460nm and 530nm respectively, with output of 6 watts in each color.