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A Dedicated Microwave Frequency Synthesizer for the Rubidium Atomic Clock
2021 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS), 2021The phase noise of the microwave synthesizer is one of the considerable limitations on the short-term stability of microwave atomic clocks through Dick effect. We present a dedicated microwave frequency synthesizer at 6.834 GHz in place of the commercial microwave signal generator.
Zhijian Yu +4 more
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Temperature Coefficient Optimization of the Physics Package of Rubidium Atomic Clock
Applied Magnetic Resonance, 2021The vapor-cell rubidium atomic clock is widely used in Global Navigation Satellite System (GNSS) and telecommunications. The sensitivity of temperature is one of the most important factors affecting the performance of rubidium Atomic Frequency Standards (RAFS).
Yonggang Guo +8 more
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Experiments on a semiconductor laser pumped rubidium atomic clock
IEEE Journal of Quantum Electronics, 1987Experiments were carried out to evaluate the performances of a semiconductor laser pumped rubidium (87Rb) atomic clock. Two kinds of Rb gas cells were used and their performances were compared [gas cell A (natural rubidium (87Rb/85Rb = \frac{3}{7} ) and buffer gases) and gas cell B (87Rb and buffer gases)].
M. Hashimoto, M. Ohtsu
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Pulsed optically pumped rubidium atomic clock with optical detection
2008 Conference on Precision Electromagnetic Measurements Digest, 2008We describe the ongoing work on a 87Rb vapor-cell atomic clock using pulsed optical pumping with an optical detection technique. In order to eliminate the light shifts and to increase the stability of vapor-cell atomic clock, pulsed optical pumping technique has been used.
I. H. Choi +5 more
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Initial Tests of a Rubidium Space Cold Atom Clock
Chinese Physics Letters, 2016We report the initial test results of a rubidium (87Rb) space cold atom clock (SCAC). The space-qualified 87Rb SCAC is composed of the physical package, the optical bench, the microwave synthesizer and the control electronics. After the system is integrated, about 108 87Rb cold atoms are captured by magneto-optical trap.
Lin Li +11 more
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An ultra-miniature rubidium atomic clock compatible with OCXO
2012 European Frequency and Time Forum, 2012This paper shows a traditional Rubidium atomic clock - E10-MRX. The incorporated lamp and ultra-miniature waveguide cavity introduced in the physics package is the main means to reduce the volume of the clock; the electronics consisting of 6.8GHz direct synthesizer and digital servo system is to enhance the automatic functions which ensure large scale ...
Thomas Cao, Clive Green, Cosmo Little
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Highly reliable optical system for a rubidium space cold atom clock
Applied Optics, 2016We describe a highly reliable optical system designed for a rubidium space cold atom clock (SCAC), presenting its design, key technologies, and optical components. All of the optical and electronic components are integrated onto an optimized two-sided 300 mm×290 mm×30 mm optical bench.
Wei, Ren +8 more
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Evaluation of New Solid Rubidium Source Using Atomic Clock Stabilization Loop
2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers), 2021We synthesized and evaluated rubidium azide as a new solid alkali metal source for microfabricated atomic clocks. A MEMS-based gas cell was filled with Rb as the alkali metal source for activation and a buffer gas (N 2 or Ar), and the frequency stability was evaluated by incorporating the cell into a feedback loop of the atomic clock.
Motoaki Hara +4 more
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The rubidium atomic clock and basic research
Physics Today, 2007The vapor-cell atomic clock finds application today in the global positioning system and telecommunications. To improve and miniaturize the humble device for future applications will require a deeper understanding of atomic and chemical physics.
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Microwave interrogation cavity for the rubidium space cold atom clock
Chinese Physics B, 2016The performance of space cold atom clocks (SCACs) should be improved thanks to the microgravity environment in space. The microwave interrogation cavity is a key element in a SCAC. In this paper, we develop a microwave interrogation cavity especially for the rubidium SCAC.
Wei Ren +4 more
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