Answers are grounded in this paper and cite their sources.
Optically pumped FIR lasers are currently in use in both frequency metrology and laser magnetic resonance spectroscopy programs in the NBS Boulder labs. The laser for use in frequency metrology is a CW 71 μm methyl alcohol waveguide laser with over 100 mW output for frequency synthesis. Another laser with an intracavity absorption cell for laser spectroscopy has been constructed and is nearly transversely pumped. The metrology technique used to measure the frequency of these lasers is briefly reviewed and a unique power meter is described.
No takes yet. Share an insight, caveat, or question.
Evenson et al. (1977) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: