Patent ID: 8451876
Filing Date: 2013-05-28
Classification: B82Y,H01L,H01S

Abstract:
1. An optical device comprising: a gallium and nitrogen containing substrate including a first crystalline surface region which has semi-polar or non-polar orientation; an active region including at least one quantum well, each of the quantum wells having a thickness of at least 1.5 nm and at least one barrier layers, each of the barrier layers having a thickness between about 2 nm and about 22 nm, and a cavity member overlaying the active region, the cavity member having a length of at least 100 um, a width of at least 0.5 um, a first end having an reflectivity of at least 85%, a second end having a reflectivity of 1% or less, the cavity member being configured to emit a directional beam of light having a spectral width of at least 3 nm, the cavity member being configured to emit radiation at a wavelength between about 430 nm to 540 nm, the spectral width being adapted to reduce speckle associated with the directional beam.