Abstract
Lasing characteristics of 1.3 µm narrow beam lasers have been investigated in terms of the energy separation between gain and waveguide regions simultaneously formed by selective MOCVD. The HR-coated lasers with a large energy separation of 110 meV exhibit a low threshold current of 12 mA, a high power of >50mW, and a high temperature of 120°C with narrow beam divergence of 11° (horizontal) and 11° (vertical).
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