A gas laser
which makes use of electronic, vibrational or rotational energy levels in molecules.
The molecules can be excited by an electric discharge, as in the case of the
, by chemical reactions, as in the
lasers, or by another laser
, as in the
far IR laser
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
on page 1920
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook