| 摘要 |
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.
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