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Ultralow noise microwave generation with fiber-based optical frequency comb and application to atomic fountain clock
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10.1063/1.3112574
/content/aip/journal/apl/94/14/10.1063/1.3112574
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/14/10.1063/1.3112574
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Figures

Image of FIG. 1.
FIG. 1.

Schematic of the experimental system. CSO denotes liquid helium-cooled cryogenic sapphire oscillator, DDS denotes direct digital synthesizer, FFT denotes fast Fourier transform analyzer, and uW denotes microwave signal.

Image of FIG. 2.
FIG. 2.

Phase noise power spectral density at 9.2 GHz of the beatnote between the microwaves generated by the FOFC and the TSOFC. Dotted line is obtained for a free running FOFC. Dashed line: two ultrastable lasers locked onto 1542 nm independent reference cavities (scaled to 9.2 GHz). Degradation from optical to microwave is attributed mainly to amplitude-to-phase noise conversion (Ref. 17) below and to limited servo gain above .

Image of FIG. 3.
FIG. 3.

Circles: Fractional frequency instability (Allan standard deviation) vs integration time of the microwave signal generated by the FOFC against the CSO at 11.932 GHz. Triangles: FOFC vs TSOFC. Diamonds: FOFC locked onto the FO2 atomic signal, compared against the CSO (quadratic drift removed). The latter instability scales as (dashed line).

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/content/aip/journal/apl/94/14/10.1063/1.3112574
2009-04-08
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ultralow noise microwave generation with fiber-based optical frequency comb and application to atomic fountain clock
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/14/10.1063/1.3112574
10.1063/1.3112574
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