METHOD AND DEVICE FOR FORMING ATOMIC CLOCK
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United States of America Patent
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app pub date -
Nov 5, 2012
filing date -
May 5, 2010
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Abstract
A method for forming an atomic clock, including: a) connecting an output terminal of a current source to a DC input terminal of a DC bias element, and connecting an output terminal of a microwave source to a high-frequency RF input terminal of the DC bias element through a microwave switch to generate a circular polarization laser; b) feeding the circular polarization laser into an atom sample bubble to interact with an alkali-metal atom, and controlling the current source through control equipment; c) modulating output current, and demodulating detection light intensity; d) controlling the microwave switch to produce a Ramsey-CPT interference fringe; and e) modulating the microwave frequency, demodulating light intensity, employing a central fringe as a frequency discrimination signal, and locking the microwave frequency at maximum peak position of the central fringe to output stable frequency of the atomic clock.
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