https://www.nist.gov/publications/discovery-and-measurement-optically-pumped-far-infrared-laser-emissions-13cd3oh
Discovery and measurement of optically pumped far-infrared laser emissions in 13CD3OH, | NIST
far infrared laser
https://www.nist.gov/publications/fine-structure-spectrum-fo-radical-observed-far-infrared-laser-magnetic-resonance
The Fine-Structure Spectrum of the FO Radical, Observed by Far-Infrared Laser Magnetic Resonance |...