Apparatus and processes for chemical sensing are disclosed. Embodiments of the present invention comprise a laser device producing a broadband spectral output that can interact with a sample, a wavelength dispersive element, and a detector. The width of the broadband spectral output is greater than or approximately equal to the width of a spectral feature of the sample. The wavelength dispersive element can resolve the broadband spectral output after the broadband spectral output has had an interaction with the sample. The detector detects the intensity of the wavelength-resolved broadband spectral output.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 This invention was made with Government support under Contract DE-AC0576RLO1830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.