Absolute diode-laser frequency calibration using varactor mixing with a stabilized CO2 laser. Ozone spectrum near the 9R6 CO2 frequency |
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| Authors: | M Lyszyk JC Depannemaecker JG Bantegnie F Herlemont J Lemaire Y Riant |
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| Institution: | Université de Lille I, Laboratoire de Spectroscopie Hertzienne (C.N.R.S. LA 249), 59655 Villeneuve d''Ascq Cedex, France;Société Anonyme des Télécommunications, 75013 Paris, France |
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| Abstract: | Efficient infrared varactor mixing near 9 μm has been performed between diode-laser and CO2 laser. Difference frequency up to 17 GHz has been detected using non linear mixing between the two radiations and the first four harmonics of a microwave frequency (f = 4.2 GHz). As a result, the absorption spectrum of ozone near the 9R6 CO2 line is frequency scaled over a 1.7 cm-1 range with microwave accuracy. |
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