External cavity surface emitting laser device having a plurality of quantum wells
AssigneeSamsung Electronics Co., Ltd.
InventorTaek Kim
Life of this patent
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Abstract
A high-power surface emitting laser capable of recycling electrons and holes by inserting a tunnel junction between quantum wells is provided. The laser includes an active layer with a plurality of quantum wells and a plurality of barriers alternately sandwiched between the plurality of quantum wells wherein a tunnel junction is inserted into the barrier between the quantum wells.
Claims19
A laser including an active layer with a plurality of quantum wells and a plurality of barriers alternately sandwiched between the plurality of quantum wells, wherein the a tunnel junction is inserted into the barrier between the quantum wells.
A surface emitting laser comprising:
- a substrate;
- a lower distributed Bragg reflector (DBR) layer formed on the substrate;
- an active layer that is formed on the lower DBR layer and generates light of a specific wavelength;
- and
- an upper DBR layer formed on the active layer,
- wherein the active layer includes a plurality of quantum wells and a plurality of barriers alternately formed between the plurality of quantum wells, and a tunnel junction is inserted into the barrier between the quantum wells.
A surface emitting laser comprising:
- a transparent substrate;
- a lower distributed Bragg reflector (DBR) layer formed on the transparent substrate;
- an active layer that is formed on the lower DBR layer and generates light of a specific wavelength;
- an upper DBR layer formed on the active layer;
- and
- an external mirror that is disposed under the transparent substrate to face the transparent substrate and outputs a portion of the light generated in the active layer while reflecting the remaining portion for reabsorption by the active layer,
- wherein the active layer includes a plurality of quantum wells and a plurality of barriers alternately formed between the plurality of quantum wells, and a tunnel junction is inserted into the barrier between the quantum wells.
Dependencies are inferred from the claim text.