Microwave interrogation frequency noise and clock frequency stability: Experimental results

Details Microwave interrogation frequency noise and clock frequency stability: Experimental results Microwave interrogation frequency noise and clock frequency stability: Experimental results

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.340..453b&link_type=abstract

In ESA, Frequency and Time Forum p 453-456 (SEE N93-24978 09-70)

Mathematics

Atomic Clocks, Electromagnetic Noise, Experimentation, Frequency Stability, Frequency Standards, Phase Shift, Resonators, Cesium, Fourier Analysis, Frequency Modulation, Frequency Synthesizers, Hydrogen Masers, Mathematical Models, Microwave Frequencies

Scientific paper

Theoretical study shows that the frequency noise of the microwave interrogation may limit the short term frequency stability of passive atomic frequency standards. In order to investigate experimentally this effect, two identical microwave interrogation systems were realized. The phase shift difference of their frequency noise can be increased and measured. The validity of the theoretical model is confirmed by the experimental results. Measurements shows that the frequency stability of an experimental cesium beam tube is close to the limit associated with the use of a high quality 10 MHz VCXO. It will be necessary to take care of this effect in future passive frequency standards using optical pumping and/or cooled atoms.

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