Optically Pumped Continuously Tunable Mid-IR Distributed-Feedback Semiconductor Laser

An 80-nm continuous, mode-hop-free, wavelength tuning range centered at 3.1 μm has been demonstrated for a large area, optically pumped mid-infrared type-II semiconductor distributed feedback (DFB) laser with a spectral linewidth of 1.2 nm at 2.5×threshold and 820 mW single-facet output power operated CW at 80 K, suitable for atmospheric pressure molecular spectroscopy and remote sensing. Waveleng...