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Method and system for providing directional light sources with broad spectrum

  • US 10,505,344 B1
  • Filed: 10/25/2018
  • Issued: 12/10/2019
  • Est. Priority Date: 05/17/2010
  • Status: Active Grant
First Claim
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1. An apparatus comprising optical device comprising:

  • a gallium and nitrogen containing surface including a first crystalline surface region which has a semi-polar orientation with a {20-21}, {30-31}, {20-2-1}, {30-3-1}, or {11-22} plane;

    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;

    a first cavity member overlaying the active region, the first cavity member having a length of at least 100 um, a width of at least 0.5 um, a first end having a reflectivity, a second end having a reflectivity, the first cavity member being configured to emit a directional beam of light having a spectral width of at least 3 nm, the first 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;

    a first electrode and a second electrode coupled to the first cavity member, the first electrode and the second electrode being insulated from each other, the first electrode being electrically coupled to a driver signal, and the second electrode being electrically coupled to an RF source;

    a second cavity member overlaying the active region; and

    a lens coupled to the optical device.

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