Physics – Optics
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979rasc...14..573c&link_type=abstract
(International Union of Radio Science, Open Symposium on Time and Frequency, 1st, Helsinki, Finland, Aug. 1-4, 1978.) Radio Scie
Physics
Optics
4
Frequency Stability, Frequency Standards, Helium-Neon Lasers, Infrared Lasers, Laser Applications, Spectral Line Width, Doppler Effect, Laser Outputs, Long Term Effects, Methane, Nonlinear Optics, Optical Resonance, Signal Stabilization
Scientific paper
The properties of stable lasers are discussed. Consideration is given to the methods of production of lasers with a very narrow linewidth of about 0.5 Hz and to their use in achieving high values of long-term frequency stability and reproducibility. The results of investigations of frequency stability of a He-Ne laser with a methane absorbant and a telescopic beam expander are presented.
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