Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ssrv...17..721w&link_type=abstract
(Workshop on Coherent Detection in Astronomy, Rhenen, Netherlands, Apr. 25, 26, 1974.) Space Science Reviews, vol. 17, July 1975
Astronomy and Astrophysics
Astronomy
Continuous Wave Lasers, Frequency Converters, Frequency Stability, Infrared Lasers, Oscillators, Far Infrared Radiation, Gas Lasers, Optical Heterodyning, Optical Pumping, Raman Lasers, Semiconductor Lasers
Scientific paper
Suitable infrared local oscillators have to satisfy essentially three requirements, related to a CW output with a reasonable power, stable single mode operation with a line width of the order of 1 MHz or preferably less, and a tunability of the local oscillator frequency over a fairly wide range. Questions concerning the frequency stability and frequency stabilization of lasers are examined. A description of gas lasers is given, taking into account near and middle infrared carbon dioxide lasers, far-infrared gas lasers, the optical pumping of polyatomic molecules, and high pressure gas lasers. Attention is also given to semiconductor diode lasers and the frequency conversion of laser radiation.
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