A high intensity source with narrow spectral bandwidth, with and without
frequency doubling and/or Raman shifting. Its use may enable the spectral apparatus to be omitted. Tunable
lasers may be either continuous (
CW) or pulsed in nature.
Source:
PAC, 1988, 60, 1449
(Nomenclature, symbols, units and their usage in spectrochemical analysis - VII. Molecular
absorption spectroscopy, ultraviolet and visible (UV/VIS) (Recommendations 1988))
on page 1453