Atomic frequency standard using free induction technique

Details Atomic frequency standard using free induction technique Atomic frequency standard using free induction technique

1979-05-29

1981-09-15

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Molecular resonance stabilization

331 14, H03L 726

Patent

active

042900301

ABSTRACT:
In the free induction technique of this invention, the maser is externally stimulated to allow significant reduction of the size of the maser, and the stimulation is turned off and allowed to decay so that the maser output is free from the external stimulation before the signal is sensed to provide a clock frequency standard. As a result, the invention solves significant problems which otherwise have limited the accuracy of prior art atomic clocks, including the problem of frequency pulling due to amplitude drift in the stimulation signal.

REFERENCES:
patent: 3234483 (1966-02-01), Arditi
patent: 4122408 (1978-10-01), Walls
Walls et al., "A new Kind of Passively Operating Hydrogen Frequency Standard", Conference Proceedings of the 30th Annual Symposium on Frequency Control, Atlantic City, N.J. 2-4 Jun. 1976, pp. 473-480.

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