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The reproducibility of intervals between the energy states of an atom or molecule can be used to produce standards of frequency or time. Saturation spectroscopy, in which a gas is located between two opposing laser beams, permits highly accurate measurement of these energy states. In this publication, the physical and technical principles underlying saturation spectroscopy of osmium tetroxide (OsO(4)) are presented in depth. Saturation experiments are then described, in which multifrequency laser light is used, as well as experiments with a frequency-stabilised CO(2) laser that can be adjusted for suitable OsO(4) lines. Finally, linear and non-linear absorption experiments on the OsO(4) molecule beam are described, which show, amongst other things that the linear optical Ramsey process can be applied to OsO(4).

Additional information

Authors: STOLL K, PTB, Braunschweig (DE)
Bibliographic Reference: Report : DE (1995) 150 pp.
Availability: Available from PTB, Braunschweig (DE)
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