Results 11 to 20 of about 3,503 (278)

The ac stark shift and space-borne rubidium atomic clocks [PDF]

Journal of Applied Physics, 2016
Due to its small size, low weight, and low power consumption, the Rb atomic frequency standard (RAFS) is routinely the first choice for atomic timekeeping in space. Consequently, though the device has very good frequency stability (rivaling passive hydrogen masers), there is interest in uncovering the fundamental processes limiting its long-term ...
Formichella, V., Camparo, J., SESIA, ILARIA, SIGNORILE, GIOVANNA, Galleani, L., Huang, M., TAVELLA, PATRIZIA   +6 more
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New miniaturized microwave cavity for Rubidium atomic clocks [PDF]

2012 IEEE Sensors, 2012
Nowadays there is an increasing need for radically miniaturized and low-power atomic frequency standards, for use in mobile and battery-powered applications. For the miniaturization of double-resonance (DR) Rubidium (87Rb) atomic clocks, the size reduction of the microwave cavity or resonator (MWR) to well below the wavelength of the atomic transition (
Violetti M., Merli F., Zürcher J.-F., Skrivervik A. K., Pellaton M., Affolderbach C., Mileti G.   +6 more
openaire   +3 more sources

Frequency stabilization of multiple lasers to a reference atomic transition of Rb

Scientific Reports, 2022
Modern atomic clocks based on the interrogation of an atomic transitions in the optical regions require multiple lasers at different wavelength for producing atomic ions, trapping and laser cooling of neutral atoms or atomic ions.
Shubham Utreja, Harish Rathore, Manoj Das, Subhasis Panja   +3 more
doaj   +1 more source

Evaluation of BDS-2 and BDS-3 Satellite Atomic Clock Products and Their Effects on Positioning

Remote Sensing, 2021
The BeiDou Navigation Satellite System (BDS) has completed third phase construction and currently provides global services, with a mixed constellation of BDS-2 and BDS-3. The newly launched BDS-3 satellites are equipped with rubidium and passive hydrogen
Shengfeng Gu, Feiyu Mao, Xiaopeng Gong, Yidong Lou, Xueyong Xu, Ye Zhou   +5 more
doaj   +1 more source

A modified C-field circuit for the rubidium atomic clock [PDF]

AIP Advances, 2021
As one of the important circuits of the rubidium atomic clock, the C-field circuit plays a significant role in the rubidium atomic clock’s performance. Generally, a C-field circuit is used to provide a constant current to a C-field coil by forming a weak magnetic field to select two hyperfine mF = 0 energy levels and thus fine-tune the transition ...
Yonggang Guo, Jun Zhang, Shiwei Wang, Kuan Wang, Lixun Wei, Wenxin Li, Fang Lu, Zhidong Liu, Wei Yang   +8 more
openaire   +2 more sources

Analysis of BDS-3 Real-Time Satellite Clock Offset Estimated in Global and Asia-Pacific and the Corresponding PPP Performances

Remote Sensing, 2022
The quality of satellite clock offset affects the performances of positioning, navigation and timing services, and thus it is essential to the Global Navigation Satellite System (GNSS).
Hu Wang, Pengyuan Li, Jiexian Wang, Hongyang Ma, Yangfei Hou, Yingying Ren   +5 more
doaj   +1 more source

Microfabricated chip-scale rubidium plasma light source for miniature atomic clocks [PDF]

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2012
We present the microfabrication and characterization of a low-power, chip-scale Rb plasma light source, designed for optical pumping in miniature atomic clocks. A dielectric barrier discharge (DBD) configuration is used to ignite a Rb plasma in a micro-fabricated Rb vapor cell on which external indium electrodes were deposited.
Venkatraman V., Petremand Y, Affolderbach C, Mileti G, de Rooij N, Shea H   +5 more
openaire   +2 more sources

Observing Spin-Squeezed States under Spin-Exchange Collisions for a Second

PRX Quantum, 2023
Using the platform of a trapped-atom clock on a chip, we observe the time evolution of spin-squeezed hyperfine clock states in ultracold rubidium atoms on previously inaccessible time scales up to 1 s.
Meng-Zi Huang, Jose Alberto de la Paz, Tommaso Mazzoni, Konstantin Ott, Peter Rosenbusch, Alice Sinatra, Carlos L. Garrido Alzar, Jakob Reichel   +7 more
doaj   +1 more source

Improving the start-up characteristics of the rubidium atomic clock

AIP Advances, 2022
Considering the importance of start-up characteristics of the rubidium atomic clock in engineering applications, the objective of this paper is to optimize the start-up characteristics of the rubidium atomic clock by studying the theory of the rubidium atomic frequency standards, especially the light pumping process, and the effect of light intensity ...
Yonggang Guo, Lili Zhu, Shiwei Wang, Jun Zhang, Fucheng Shi, Jinhai Zhang, Jianxiang Wang, Wenxin Li, Zhidong Liu   +8 more
openaire   +2 more sources

Low-Threshold 795 nm Oxide-Confined Distributed Feedback Lasers With Surface Gratings

IEEE Photonics Journal, 2023
795 nm oxide-confined distributed feedback (DFB) lasers have been developed. The oxide-confined structure is used to realize lateral optical and current confinement, and the first-order surface gratings offer the frequency selectivity for single ...
Pingping Qiu, Hengjie Zhou, Tongxin Wang, Qiuhua Wang, Qiang Kan   +4 more
doaj   +1 more source