Results 231 to 240 of about 16,536 (302)

Discussions of a2-Drift Variations of BeiDou-3 Satellite Rubidium Atomic Clocks

IEEE Transactions on Instrumentation and Measurement, 2022
Slow and significant stochastic variations named “a2-drift” variations are observed in this contribution, which are discovered during the estimation of frequency aging of BeiDou-3 rubidium (Rb) clocks. The magnitude of the variations suffered on BeiDou-3
Yuexin Ma, Chengpan Tang, Xiaogong Hu, Zhiqiao Chang, Yufei Yang, Jianhua Yang   +5 more
semanticscholar   +1 more source

Orientation Error Compensation for a system of Two Rubidium Atomic Clocks Placed in a Directionally Varying Magnetic Field

2021 International Conference on Electrical Engineering and Photonics (EExPolytech), 2021
This paper considers the possibility of compensating for the orientation frequency error of a system of two small-sized rubidium atomic clocks caused by the difference between the longitudinal and transverse screening coefficients of the magnetic shield ...
S. Ermak, V. Semenov
semanticscholar   +1 more source

Digital lock-in amplifier for space rubidium atomic clock

Review of Scientific Instruments, 2021
In many low-noise applications, extracting information from the extremely noisy signal is required. This task can be accomplished by a lock-in amplifier if the frequency of the signal is known before detection. Error signal output from the physics package of the rubidium atomic clock (RbAC) is one of those noisy signals.
Pratik Jain, Priyanka Priya, T. V. S. Ram, K. S. Parikh, Thejesh N. Bandi   +4 more
openaire   +2 more sources

Rubidium atomic clock with drift compensation

CPEM 2010, 2010
This paper shows the results of an automatic system that compensates drifts of rubidium atomic clocks, comparing to GPS. This leads to high stability in large time and low noise in short time.
Leonardo Trigo, Daniel Slomovitz
openaire   +1 more source

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