HIGH POWER SINGLE MODE VERTICAL CAVITY SURFACE EMITTING LASER
First Claim
4-1. A mirror layer as defined in claim 11, wherein each cavity formed in the photonic crystal has a depth that extends through the photonic crystal.
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Accused Products
Abstract
A single mode high power vertical cavity surface emitting laser (VCSEL) using photonic crystals. A photonic crystal is included in at least one mirror layer of a VCSEL. The reflectivity of the photonic crystal is dependent on the wavelength and incident angle of the photons. The photonic crystal can be formed such that the VCSEL lases at a single mode. Because a single mode is generated, the aperture of the VCSEL can be enlarged to increase the power that is generated by the VCSEL for that mode. The photonic crystal can be used with/without DBR layers. The photonic crystal, in one example, forms an external cavity.
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Citations
24 Claims
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4-1. A mirror layer as defined in claim 11, wherein each cavity formed in the photonic crystal has a depth that extends through the photonic crystal.
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11. In a vertical cavity surface emitting laser, a mirror layer for reflecting a single mode such that the vertical cavity surface emitting laser emits the single mode with increased power, the mirror layer comprising:
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a plurality of Distributed Bragg reflector layers formed on an active region of the vertical cavity surface emitting laser, wherein the plurality of Distributed Bragg reflector layers terminates a gain cavity that includes one or more quantum wells; and
a photonic crystal formed on the plurality of Distributed Bragg reflector layers such that the photonic crystal forms an external cavity, wherein a plurality of cavities are formed in the photonic crystal to create a cavity structure in the photonic crystal. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15)
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16. A vertical cavity surface emitting laser that emits a single mode, the vertical cavity surface emitting laser comprising:
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a lower mirror layer formed on a substrate, wherein the first mirror layer includes Distributed Bragg Reflector layers;
an active region formed on the lower mirror layer, wherein the active region includes a gain medium that provides gain to photons that are reflected through the active region; and
an upper mirror layer formed on the active region, wherein the upper mirror layer includes;
a plurality of Distributed Bragg Reflector layers formed on the active region; and
a photonic crystal formed on the plurality of Distributed Bragg Reflector layers, wherein the single mode is reflected by the photonic crystal such that the single mode has appreciable gain. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification