A hazardous gas detector that includes a housing defining an interior region is provided. Also included is a laser emitting component oriented to emit a laser light away from the housing. Further included is a lens disposed within an aperture defined by the housing, the lens allowing returning infrared light of the laser light to enter the interior region. Yet further included is a mirror disposed within the interior region and oriented to split the returning laser light into a short wave infrared light and a long wave infrared light. Also included is a one-dimensional (1D) camera pixel array disposed within the interior region, the 1D camera imaging a planar region that includes an illuminated portion comprising the short wave infrared light.