Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pmlp.rept.....s&link_type=abstract
Unknown
Astronomy and Astrophysics
Astronomy
Carbon Dioxide Lasers, Infrared Spectroscopy, Laser Spectrometers, Line Spectra, Molecular Spectra, Molecular Spectroscopy, Absorption Spectra, Electro-Optical Effect, Heterodyning, Microwave Spectrometers, Molecular Structure, Product Development
Scientific paper
Position and profile of molecular absorption lines in the infrared were investigated in order to obtain information about pressure and temperature of astronomical objects. A laser sideband spectrometer with high resolution was developed. Light of a CO2 laser is modulated with microwave frequencies using the electro-optical effect. The spectrometer was tested on position and profiles of absorption lines of the molecules NH3 and C2H4 and shows a resolution of 3 million. Measurements on CH3F show that the sideband laser is a suitable local oscillator for astronomical heterodyne spectrometers.
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