Photonic pulse
A photonic pulse was a type of starship-mounted energy weapon capable of disrupting a vessel's sensor array.

Such a pulse was utilized by Kovin, an Entharan arms merchant, while his ship attempted to evade the  in 2374. The pulse took Voyagers sensors offline, requiring them to re-initialize the array before they were able to detect Kovin's warp signature. ()

See also 
 Photon pulse
 Anti-photon pulse

de: Photonischer Impuls
Directed energy weapons