coherent source

in spectrochemistry
Also contains definition of: non-coherent source in spectrochemistry
Those sources where the @R05048@ has a constant phase relationship between waves spatially as well as temporally, e.g. lasers. Non-coherent optical sources emit radiation which is randomly distributed in phase, spatially as well as temporally. Most sources which are used in @S05848@ and for spectrochemical analysis conform to this latter group.
PAC, 1985, 57, 1453. (Nomenclature, symbols, units and their usage in spectrochemical analysis - V: Radiation sources (Recommendations 1985)) on page 1456 [Terms] [Paper]