Results 231 to 240 of about 4,797 (280)

All-Optical Integrated rubidium Atomic Clock

2011 Joint Conference of the IEEE International Frequency Control and the European Frequency and Time Forum (FCS) Proceedings, 2011
We report on progress in the development of an All-Optical Integrated Micro-Primary Atomic Clock (AO-IMPAC). The operattion of the clock is based on an inhomogeneously broadened rubidium optical transition used for stabilization of a Kerr optical frequency comb generated in a high-Q whispering gallery mode (WGM) microresonator. We have demonstrated the
L. Maleki, A. A. Savchenkov, V. S. Ilchenko, W. Liang, D. Eliyahu, A. B. Matsko, D. Seidel, N. P. Wells, J. C. Camparo, B. Jaduszliwer   +9 more
openaire   +1 more source

Atomic phase delay in a rubidium atomic clock

1993 IEEE International Frequency Control Symposium, 2002
The phase delay that exists between the oscillating atomic system and the probing microwave field in a rubidium atomic clock is examined. This phase delay must be accounted for in the feedback control circuitry of the clock in order to maximize the device's short-term stability.
J.C. Camparo, R.P. Frueholz
openaire   +1 more source

CPT atomic clock based on rubidium 85

EFTF-2010 24th European Frequency and Time Forum, 2010
We present a compact physics package based on coherent population trapping (CPT) in rubidium 85. The architecture of the package is described along with results obtained using optical- and microwave spectroscopy. We also report the stability of the CPT resonance to variations in operating parameters such as microwave modulation power and vapour cell ...
C. Schori, G. Mileti, B. Leuenbeger, P. Rochat   +3 more
openaire   +1 more source

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), 2021
The 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, Zhijing Du, Yanyan Liu, Kemu Wang, Shougang Zhang   +4 more
openaire   +1 more source

Temperature Coefficient Optimization of the Physics Package of Rubidium Atomic Clock

Applied Magnetic Resonance, 2021
The 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, Jun Zhang, Shiwei Wang, Kuan Wang, Fucheng Shi, Wenxin Li, Fang Lu, Zhidong Liu, Lili Zhu   +8 more
openaire   +1 more source

Experiments on a semiconductor laser pumped rubidium atomic clock

IEEE Journal of Quantum Electronics, 1987
Experiments 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
openaire   +1 more source

Pulsed optically pumped rubidium atomic clock with optical detection

2008 Conference on Precision Electromagnetic Measurements Digest, 2008
We 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, Y.-H. Park, S. H. Lee, J. K. Lee, T. Y. Kwon, S. E. Park   +5 more
openaire   +1 more source

Initial Tests of a Rubidium Space Cold Atom Clock

Chinese Physics Letters, 2016
We 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, Qiu-Zhi Qu, Bin Wang, Tang Li, Jian-Bo Zhao, Jing-Wei Ji, Wei Ren, Xin Zhao, Mei-Feng Ye, Yuan-Yuan Yao, De-Sheng Lü, Liang Liu   +11 more
openaire   +1 more source

An ultra-miniature rubidium atomic clock compatible with OCXO

2012 European Frequency and Time Forum, 2012
This 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
openaire   +1 more source

Highly reliable optical system for a rubidium space cold atom clock

Applied Optics, 2016
We 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, Yanguang, Sun, Bin, Wang, Wenbing, Xia, Qiuzhi, Qu, Jingfeng, Xiang, Zuoren, Dong, Desheng, Lü, Liang, Liu   +8 more
openaire   +2 more sources