Drift-Compensated Low-Noise Frequency Synthesis Based on a cryoCSO for the KRISS-F1

被引：5

作者：

Heo, Myoung-Sun ^{[1
]}

Park, Sang Eon ^{[1
,2
]}

Lee, Won-Kyu ^{[1
,2
]}

Lee, Sang-Bum ^{[1
]}

Hong, Hyun-Gue ^{[1
]}

Kwon, Taeg Yong ^{[1
]}

Park, Chang Yong ^{[1
,2
]}

Yu, Dai-Hyuk ^{[1
]}

Santarelli, Giorgio ^{[3
]}

Hilton, Ashby Paul ^{[4
,5
]}

Luiten, Andre Nicholas ^{[4
,5
]}

Hartnett, John Gideon ^{[4
,5
]}

机构：

[1] Korea Res Inst Stand & Sci, Ctr Time & Frequency, Div Phys Metrol, Daejeon 341113, South Korea

[2] Univ Sci & Technol, Sci Measurements, Daejeon 34114, South Korea

[3] Univ Bordeaux, IOGS, CNRS, Lab Lab Photon Numer & Nanosci, F-33400 Talence, France

[4] Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia

[5] Univ Adelaide, Inst Photon & Adv Sensing, Adelaide, SA 5005, Australia

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2017年 / 66卷 / 06期

基金：

澳大利亚研究理事会;

关键词：

Cryogenic sapphire oscillator (CSO); frequency stability; frequency synthesizer; hydrogen maser; optical frequency comb; quantum projection noise (QPN); stable lasers; CRYOGENIC-SAPPHIRE-OSCILLATOR; DISTRIBUTED CAVITY PHASE; ATOMIC FOUNTAIN CLOCK; ACCURACY EVALUATION; CESIUM FOUNTAIN; STABILITY; SIGNAL; SHIFTS;

D O I：

10.1109/TIM.2016.2620187

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In 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 ultra-stable laser, is better than 5x10(-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 2.5x10(-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.

引用

页码：1343 / 1348

页数：6

共 24 条

[1] High-Stability Comparison of Atomic Fountains Using Two Different Cryogenic Oscillators [J].