2020
DOI: 10.1063/5.0003839
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The optically generated microwave oscillator with long-term stability locked at hydrogen maser

Abstract: We present an oscillator of optically generated microwaves (OGMs) based on an optical frequency comb (OFC) and an ultrastable laser (USL). The USL provides short-term stability, and the OFC transfers the short-term stability to radio frequencies. Frequency synthesis is used to transfer the stability of the OGM oscillator to an oven-controlled crystal oscillator (OCXO). To improve the long-term stability of the OCXO, an additional compensating loop was applied to lock the long term stability of OGM at a hydroge… Show more

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Cited by 3 publications
(2 citation statements)
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“…The design and operation of the fountain clock used in our experiment are described elsewhere. [17,26,27] Here, only the essential part related to the optical state selection is introduced. As indicated in Fig.…”
Section: System Design and Theoretical Analysis 21 System Designmentioning
confidence: 99%
“…The design and operation of the fountain clock used in our experiment are described elsewhere. [17,26,27] Here, only the essential part related to the optical state selection is introduced. As indicated in Fig.…”
Section: System Design and Theoretical Analysis 21 System Designmentioning
confidence: 99%
“…Then the OP is implemented experimentally to increase the atom population in the |F = 4, m F = 0 state, and improve the frequency stability of the fountain clock NIM6, which used an optically generated microwave as the local oscillator. [17][18][19][20][21] The improvements of signal-to-noise ratio (SNR) under different conditions are presented, and the influence of different dead times on the relative frequency stability due to the Dick effect is also shown at the end.…”
Section: Introductionmentioning
confidence: 99%