Laser diodes with an etched facet and surface treatment
First Claim
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1. A laser diode device comprising:
- a surface region bounded by edge regions including a first edge region; and
a laser stripe overlying a portion of the surface region, the laser stripe characterized by a length in a length direction and a width in a width direction, in the length direction the laser stripe includes a first end and a second end opposite the first end, the length direction being substantially orthogonal to the first edge region, and the width direction being substantially parallel to the first edge region;
wherein the laser stripe forms a ridge that protrudes outward from the surface region and is spaced on all sides from the edge regions by portions of the surface region;
wherein the first end of the laser stripe comprises a first facet, and the second end of the laser stripe comprises a second facet, the first facet having a primary emission surface, the first facet being substantially parallel to and recessed from the first edge region in the length direction;
wherein the laser stripe is operable to emit electromagnetic radiation in a wavelength range selected from a first range of about 400 nm to about 435 nm, a second range of about 435 nm to about 480 nm, a third range of about 480 nm to about 505 nm, and a fourth range of about 505 nm to about 550 nm, and wherein the first edge region comprises a first surface-treated region that includes a laser slag material and is configured to interact with the electromagnetic radiation emitted by the laser stripe.
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Abstract
A gallium- and nitrogen-containing laser device including an etched facet with surface treatment to improve an optical beam is disclosed.
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Citations
20 Claims
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1. A laser diode device comprising:
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a surface region bounded by edge regions including a first edge region; and a laser stripe overlying a portion of the surface region, the laser stripe characterized by a length in a length direction and a width in a width direction, in the length direction the laser stripe includes a first end and a second end opposite the first end, the length direction being substantially orthogonal to the first edge region, and the width direction being substantially parallel to the first edge region; wherein the laser stripe forms a ridge that protrudes outward from the surface region and is spaced on all sides from the edge regions by portions of the surface region; wherein the first end of the laser stripe comprises a first facet, and the second end of the laser stripe comprises a second facet, the first facet having a primary emission surface, the first facet being substantially parallel to and recessed from the first edge region in the length direction; wherein the laser stripe is operable to emit electromagnetic radiation in a wavelength range selected from a first range of about 400 nm to about 435 nm, a second range of about 435 nm to about 480 nm, a third range of about 480 nm to about 505 nm, and a fourth range of about 505 nm to about 550 nm, and wherein the first edge region comprises a first surface-treated region that includes a laser slag material and is configured to interact with the electromagnetic radiation emitted by the laser stripe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A laser diode device comprising:
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a surface region bounded by edge regions including a first edge region; and a laser stripe overlying a portion of the surface region, the laser stripe characterized by a length in a length direction and a width in a width direction, in the length direction the laser stripe includes a first end and a second end opposite the first end, the length direction being substantially orthogonal to the first edge region, and the width direction being substantially parallel to the first edge region; wherein the laser stripe forms a ridge that protrudes outward from the surface region and is spaced on all sides from the edge regions by portions of the surface region; wherein the first end of the laser stripe comprises a first facet, and the second end of the laser stripe comprises a second facet, the first facet having a primary emission surface, the first facet being substantially parallel to and recessed from the first edge region in the length direction by a length ranging from about 0.5 μ
m to about 100 μ
m;wherein the laser stripe is operable to emit electromagnetic radiation at a wavelength ranging from about 425 nm to about 485 nm or from about 500 nm to about 550 nm, and wherein the first edge region comprises a first surface-treated region that includes a laser slag material and is configured to interact with the electromagnetic radiation emitted by the laser stripe, the first surface-treated region comprising one of a reflector, an absorber, or a scatterer. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification