Method and system for providing directional light sources with broad spectrum
First Claim
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1. An apparatus comprising:
- an optical device comprising;
a gallium and nitrogen containing surface having a first crystalline surface region orientation, the first crystalline surface region orientation being nonpolar or semi-polar;
an active region comprising at least one quantum well and at least one barrier layer;
a first cavity member overlaying the active region, the cavity having a length of at least 100 um, a width of at least 0.5 um, and being configured to emit laser light with a spectral width of at least 0.5 nm;
an RF source electrically coupled to the active region for providing RF modulation, the RF modulation being configured to induce spectral broadening and increase the spectral width to at least 1.5 nm; and
a lens coupled to the optical device.
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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.
257 Citations
20 Claims
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1. An apparatus comprising:
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an optical device comprising; a gallium and nitrogen containing surface having a first crystalline surface region orientation, the first crystalline surface region orientation being nonpolar or semi-polar; an active region comprising at least one quantum well and at least one barrier layer; a first cavity member overlaying the active region, the cavity having a length of at least 100 um, a width of at least 0.5 um, and being configured to emit laser light with a spectral width of at least 0.5 nm; an RF source electrically coupled to the active region for providing RF modulation, the RF modulation being configured to induce spectral broadening and increase the spectral width to at least 1.5 nm; and a lens coupled to the optical device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A display apparatus comprising:
an optical device comprising; a gallium and nitrogen containing surface having a first crystalline surface region orientation; an active region comprising at least one quantum well and at least one barrier layer; a first cavity member overlaying the active region, the cavity having a length of at least 100 um, a width of at least 0.5 um, and being configured to emit laser light with a spectral width of at least 0.5 nm; an RF source electrically coupled to the active region for providing RF modulation, the RF modulation being configured to induce spectral broadening and increase the spectral width to at least 1.5 nm; and a lens coupled to the optical device. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for operating an optical device in an apparatus comprising:
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providing an apparatus comprising a laser device comprising a gallium and nitrogen containing surface including a first crystalline surface region orientation, an active region comprising at least one quantum well and at least one barrier layer; and
a first cavity member overlaying the active region, the cavity having a length of at least 100 um, a width of at least 0.5 um, and being configured to emit laser light with a spectral width of at least 0.5 nm;inducing spectral broadening using an RF source electrically coupled to the active region for providing RF modulation, the RF modulation being configured to induce the spectral broadening and increase the spectral width to at least 1.5 nm; and coupling the emitted laser light with a lens. - View Dependent Claims (20)
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Specification