Phase modulation for reduced vibration sensitivity in laser-cooled clocks in space
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This paper discusses future phase modulations with independent cavity-phase control in laser cooled clocks in space.
The standard interrogation technique in atomic beam clocks is square-wave frequency modulation (SWFM), which suffers a first order sensitivity to vibrations as changes in the transit time of the atoms translates to perceived frequency errors. Square-wave phase modulation (SWPM) interrogation eliminates sensitivity to this noise.
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