High performance hybrid integrated 2-3 µm wavelength lasers for gas- and bio-sensing

We present state of the art hybrid integrated GaSb/Si3N4 light sources towards building miniaturized and affordable sensors. Presented laser configurations include: 1) Widely tunable 2.7 µm wavelength laser with 170 nm continuous tuning range. 2) Discretely tunable laser for simultaneously multiwavelength spectroscopy of S2H, H2O and CO2-gasses with greatly simplified calibration procedure compared to conventional tunable lasers. 3) Lasers with ultra-pure spectrum at 2 µm wavelength reaching down to 6 kHz-linewidth towards use in atom spectroscopy or to seed advanced lasers. Used configurations and material systems are wavelength agnostic in 1.9 – 3 µm range and therefore capable to capture wide range of applications. We discuss about applications in environmental and industrial gas sensing and detection of biomarkers such as lactate, urea and glucose.