A chromoelectric pulse was a type of energy discharge.
In 2374, Tom Paris fired a chromoelectric pulse at a shuttlecraft being piloted by a genome thief, which had been modified with a coaxial warp drive. Paris targeted the pulse at the coaxial drive's polaric modulator, which acted to dilute the particle stream being drawn into the drive in order to solve the problem of engine overload caused by particle instability. This had the effect of disrupting the shuttle's engines, preventing it from entering coaxial space. (VOY: "Vis à Vis")