CPC H01S 5/18397 (2013.01) [H01S 5/18305 (2013.01); H01S 5/18313 (2013.01); H01S 5/18388 (2013.01); H01S 5/2081 (2013.01); H01S 5/3095 (2013.01); H01S 5/3416 (2013.01); H01S 5/426 (2013.01); H01S 5/183 (2013.01); H01S 5/18394 (2013.01)] | 20 Claims |
1. A vertical cavity surface emitting laser (VCSEL) device, comprising:
a substrate layer;
a first set of epitaxial layers for a bottom-emitting VCSEL disposed on the substrate layer, the first set of epitaxial layers comprising:
a first set of mirrors; and
at least one first active layer; and
a second set of epitaxial layers for a top-emitting VCSEL disposed on the first set of epitaxial layers for the bottom-emitting VCSEL, the second set of epitaxial layers comprising:
a second set of mirrors; and
at least one second active layer,
wherein the top-emitting VCSEL and the bottom-emitting VCSEL are configured to emit light in opposite light emission directions.
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