Drift-compensated low-noise frequency synthesis based on a cryoCSO for the KRISS-F1

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dc.contributor.authorHeo, M.-S.
dc.contributor.authorPark, S.
dc.contributor.authorLee, W.-K.
dc.contributor.authorLee, S.-B.
dc.contributor.authorHong, H.-G.
dc.contributor.authorKwon, T.
dc.contributor.authorPark, C.
dc.contributor.authorYu, D.-H.
dc.contributor.authorSantarelli, G.
dc.contributor.authorHilton, A.
dc.contributor.authorLuiten, A.
dc.contributor.authorHartnett, J.
dc.date.issued2017
dc.descriptionDate of publication November 8, 2016; date of current version May 10, 2017.
dc.description.abstractIn this paper, we report on the implementation and stability analysis of a drift-compensated frequency synthesizer from a cryogenic sapphire oscillator (CSO) designed for a Cs/Rb atomic fountain clock. The synthesizer has two microwave outputs of 7 and 9 GHz for Rb and Cs atom interrogation, respectively. The short-term stability of these microwave signals, measured using an optical frequency comb locked to an ultrastable laser, is better than 5×10−15 at an averaging time of 1 s. We demonstrate that the short-term stability of the synthesizer is lower than the quantum projection noise limit of the Cs fountain clock, KRISS-F1(Cs) by measuring the short-term stability of the fountain with varying trapped atom number. The stability of the atomic fountain at 1 s averaging time reaches 2.5×10−14 at the highest atom number in the experiment when the synthesizer is used as an interrogation oscillator of the fountain. In order to compensate the frequency drift of the CSO, the output frequency of a waveform generator, in the synthesis chain, is ramped linearly. By doing this, the frequency stability of the synthesizer at an average time of one hour reaches a level of 10−16, which is measured with the fountain clock.
dc.description.statementofresponsibilityMyoung-Sun Heo, Sang Eon Park, Won-Kyu Lee, Sang-Bum Lee, Hyun-Gue Hong, Taeg Yong Kwon, Chang Yong Park, Dai-Hyuk Yu, Giorgio Santarelli, Ashby Paul Hilton, Andre Nicholas Luiten, and John Gideon Hartnett
dc.identifier.citationIEEE Transactions on Instrumentation and Measurement, 2017; 66(6):1343-1348
dc.identifier.doi10.1109/TIM.2016.2620187
dc.identifier.issn0018-9456
dc.identifier.issn1557-9662
dc.identifier.orcidHilton, A. [0000-0002-0554-6999]
dc.identifier.orcidLuiten, A. [0000-0001-5284-7244]
dc.identifier.urihttp://hdl.handle.net/2440/102920
dc.language.isoen
dc.publisherIEEE
dc.relation.granthttp://purl.org/au-research/grants/arc/LP110200142
dc.relation.granthttp://purl.org/au-research/grants/arc/LE130100163
dc.rights© 2016 IEEE.
dc.source.urihttps://doi.org/10.1109/tim.2016.2620187
dc.subjectCryogenic sapphire oscillator (CSO); frequency stability; frequency synthesizer; hydrogen maser; optical frequency comb; quantum projection noise (QPN); stable lasers
dc.titleDrift-compensated low-noise frequency synthesis based on a cryoCSO for the KRISS-F1
dc.typeJournal article
pubs.publication-statusPublished

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