OPTICAL SEMICONDUCTOR DEVICE AND SEMICONDUCTOR LASER DEVICE
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United States of America Patent
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Issued Date -
Oct 27, 2022
app pub date -
Apr 20, 2022
filing date -
Apr 20, 2022
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Abstract
An optical semiconductor device includes an active layer having a plurality of quantum dot layers. The plurality of quantum dot layers includes at least one quantum dot player doped with a p-type impurity. Further, the plurality of quantum dot layers includes at least two quantum dot layers having different emission wavelengths and different p-type impurity concentrations.
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