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He-Ne laser frequencies near 2.4 µm and their application to hydrogen fluoride detection

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2 Author(s)
J. Eberhardt ; Commonwealth Scientific and Industrial Res. Organization, Lucas Heights Res. Labs., Sutherland, Australia ; A. Pryor

He-Ne lasers can provide three frequencies near 2.4 μm, one of which coincides with the 1R(5) frequency of HF at 4173.98 cm-1. Either of the other frequencies may serve as a reference for absorbance measurements. One of these, at 4169.33 cm-1, is a new lasing transition not previously observed ( 4d'_{4}-3P_{9} ). Operating conditions are discussed.

Published in:

IEEE Journal of Quantum Electronics  (Volume:19 ,  Issue: 6 )