direct laser absorption spectroscopy laser electric resonance spectroscopy Stark spectroscopy laser electric resonance spectrometry CHMO:0000443 laser Stark spectrometry laser Stark spectroscopy A type of laser spectroscopy where a fixed-wavelength infrared or ultraviolet laser is used to excite the sample which is placed in an electric field. By varying the strength of the applied electric field some vibrational–rotational transitions can be made to coincide with the laser wavelength and the absorption of the laser light is measured.