A
liquid laser in which rare earth ions in solution are used as the
laser active medium. An example is
KrF
in liquid
Kr
laser.
Source:
PAC, 1995, 67, 1913
(Nomenclature, symbols, units, and their usage in spectrochemical analysis-XV. Laser-based molecular spectroscopy for chemical analysis - laser fundamentals (IUPAC Recommendations 1995))
on page 1921