Oscillators – Automatic frequency stabilization using a phase or frequency... – Molecular resonance stabilization
Patent
1991-06-14
1992-09-08
Scott, Jr., Leon
Oscillators
Automatic frequency stabilization using a phase or frequency...
Molecular resonance stabilization
331 941, 372 2, H03L 726
Patent
active
051461854
ABSTRACT:
A compact frequency standard having a dielectrically loaded microwave resonant cavity. One embodiment uses light from a single laser at the frequency that causes F=4.fwdarw.F'=5 transitions in cesium, circularly polarizes a portion of the light to optically pump a cesium beam and uses another linearly polarized portion of the light to detect fluorescence after the beam passes through the microwave cavity. The microwave cavity is preferably dielectrically loaded cavity which is resonant in the TE.sub.011 or TE.sub.013 modes. The dielectric within the microwave cavity is in the form of a hollow cylinder with varying sidewalls displacing the effective axis of the microwave cavity from the geometric axis to produce a Ramsey resonance in a single cavity and creating inhomogeneities in the static field that cause narrow resonance anomalies in the cesium spectrum, which resonances may be locked onto to provide improved frequency standards.
REFERENCES:
patent: 4146848 (1979-03-01), Hellwig et al.
patent: 4315224 (1982-02-01), Szekiel et al.
patent: 4323860 (1982-08-01), Leiby, Jr. et al.
patent: 4684900 (1987-08-01), Avila et al.
Alberding Gilbert E.
Ball Corporation
Jr. Leon Scott
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