High-power and high-efficiency midwave-infrared interband cascade lasers

摘要

A ten-stage interband cascade laser emitting at 3.3-3.6 μm exhibits a voltage drop only 4% above the theoretical minimum, and operates to room temperature in pulsed mode. At 78 K, a five-stage device mounted epitaxial-side-up with coated facets has a maximum cw wallplug efficiency of 21%, and a second device produces up to 1.1 W of cw power.