Structural dependence of 1.3 µm narrow beamlasers fabricated by selective MOCVD

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).