Long-Term Frequency Instability of a Portable Cold 87Rb Atomic Clock

2018 ◽  
Author(s):  
F. G. Ascarrunz ◽  
Y. O. Dudin ◽  
Maria. C. Delgado Aramburo ◽  
J. Savory ◽  
S.R. Jefferts
Keyword(s):  
Atomic Clock ◽  
Frequency Instability ◽  
Term Frequency

Pulsed optically pumped atomic clock with a medium- to long-term frequency stability of 10−15

2020 ◽  
Vol 91 (4) ◽  
pp. 045114
Author(s):  
Qian Shen ◽  
Haixiao Lin ◽  
Jianliao Deng ◽  
Yuzhu Wang
Keyword(s):  
Atomic Clock ◽  
Frequency Stability ◽  
Optically Pumped ◽  
Term Frequency

scholarly journals Rubidium Clock Lamplight Variations and Long-Term Frequency Instability: First Analyses of Multiyear GPS Data

2016 ◽  
Author(s):  
James Camparo ◽  
Ilaria Sesia ◽  
Valerio Formichella ◽  
Giovanna Signorile ◽  
Lorenzo Galleani ◽  
...  
Keyword(s):  
Frequency Instability ◽  
Gps Data ◽  
Term Frequency ◽  
Rubidium Clock

Long-term frequency instability of atomic frequency references based on coherent population trapping and microfabricated vapor cells

2006 ◽  
Vol 23 (4) ◽  
pp. 593 ◽  
Author(s):  
Vladislav Gerginov ◽  
Svenja Knappe ◽  
Vishal Shah ◽  
Peter D. D. Schwindt ◽  
Leo Hollberg ◽  
...  
Keyword(s):  
Frequency Instability ◽  
Coherent Population Trapping ◽  
Term Frequency ◽  
Vapor Cells ◽  
Population Trapping ◽  
Atomic Frequency

All polarization-maintaining Er:fiber-based optical frequency comb for frequency comparison of optical clocks

2021 ◽  
Author(s):  
Zhang Pan ◽  
Zhang Yan-Yan ◽  
Li Ming-Kun ◽  
Rao Bing-Jie ◽  
Yan Lu-Lu ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Signal To Noise Ratio ◽  
Frequency Instability ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Thermal Drift ◽  
Signal To Noise ◽  
Frequency Comparison ◽  
Polarization Maintaining

Abstract In this research, we demonstrate an optical frequency comb (OFC) based on a turnkey mode-locked laser with a figure-9 structure and polarization-maintaining fibers for frequency comparison between optical clocks with wavelengths of 698 nm, 729 nm, 1068 nm and 1156 nm. We adopt a multi-branch approach in order to produce high power OFC signals at these specific wavelengths, enabling the signal-to-noise ratio of the beatnotes between the OFC and the clock lasers beyond 30 dB at a resolution bandwidth of 300 kHz. This approach makes the supercontinuum spectra generating process much easier in comparison to a single branch OFC; however, more out-of-loop fibers degrade the long term frequency instability due to thermal drift. To minimize the thermal drift effect, we set the fiber lengths of different branches to be similar, and we stabilize the temperature as well. The out-of-loop frequency instability of the OFC due to the incoherence of the multi-branch is about 5.5×10-19 @ 4000 s, while the in-loop frequency instability of f ceo and that of f beat are 7.5×10-18 @1 s and 8.5×10-18 @1 s, respectively. The turnkey OFC meets the requirement of frequency comparison between the best optical clocks.

Long-Term Frequency Stabilization with Digital Servo System

2009 ◽  
Vol 36 (4) ◽  
pp. 804-808 ◽  
Author(s):  
姬中华 Ji Zhonghua ◽  
张冉冉 Zhang Ranran ◽  
马杰 Ma Jie ◽  
董磊 Dong Lei ◽  
赵延霆 Zhao Yanting ◽  
...  
Keyword(s):  
Servo System ◽  
Frequency Stabilization ◽  
Term Frequency

Long-Term Frequency Stabilization of Multi-Lasers Based on Wavemeter

2019 ◽  
Vol 46 (2) ◽  
pp. 0211004 ◽  
Author(s):  
钱源 Qian Yuan ◽  
梁世勇 Liang Shiyong ◽  
黄垚 Huang Yao ◽  
管桦 Guan Hua ◽  
高克林 Gao Kelin
Keyword(s):  
Frequency Stabilization ◽  
Term Frequency
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