Method and system for providing bidirectional light sources with broad spectrum
AssigneeSoraa, Inc.
InventorsJames W. Raring, Mathew C. Schmidt, Yu-Chia Chang
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Abstract
A system and method for providing laser diodes with broad spectrum is described. GaN-based laser diodes with broad or multi-peaked spectral output operating are obtained in various configurations by having a single laser diode device generating multiple-peak spectral outputs, operate in superluminescene mode, or by use of an RF source and/or a feedback signal. In some other embodiments, multi-peak outputs are achieved by having multiple laser devices output different lasers at different wavelengths.
Claims13
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.
The device of claim I, wherein the cavity member is configured to emit radiation at a wavelength between about 500 nm to 540 nm.
Dependencies are inferred from the claim text.