scholarly journals Laser-pumped and laser-cooled atomic clocks for space applications

1998 ◽  
Vol 16 (4) ◽  
pp. 627-639 ◽  
Author(s):  
Walter F. Buell
Keyword(s):  
Cold Atom ◽  
Coherent Population Trapping ◽  
Time Transfer ◽  
Trapped Atoms ◽  
Space Applications ◽  
Vapor Cell ◽  
Frequency Standards ◽  
Laser Pumping ◽  
Population Trapping ◽  
Optically Trapped

Highly stable atomic frequency standards are of increasing importance for a variety of space applications, ranging from communication to navigation and time transfer to tests of fundamental science. We present a discussion of the improvements possible with laser pumping of vapor cell clocks, including applying coherent population trapping (CPT) techniques. We also present our progress toward a cold atom clock based on magneto-optically trapped atoms for space applications.

scholarly journals Symmetric autobalanced Ramsey interrogation for high-performance coherent-population-trapping vapor-cell atomic clock

2018 ◽  
Vol 112 (24) ◽  
pp. 244102 ◽  
Author(s):  
M. Abdel Hafiz ◽  
G. Coget ◽  
M. Petersen ◽  
C. E. Calosso ◽  
S. Guérandel ◽  
...  
Keyword(s):  
High Performance ◽  
Atomic Clock ◽  
Coherent Population Trapping ◽  
Vapor Cell ◽  
Population Trapping

scholarly journals The Microfabricated Alkali Vapor Cell with High Hermeticity for Chip-Scale Atomic Clock

2022 ◽  
Vol 12 (1) ◽  
pp. 436
Author(s):  
Shuo Jia ◽  
Zhiyuan Jiang ◽  
Binbin Jiao ◽  
Xiaochi Liu ◽  
Yijie Pan ◽  
...  
Keyword(s):  
Laser Intensity ◽  
Atomic Clock ◽  
Coherent Population Trapping ◽  
Wet Etching ◽  
Anodic Bonding ◽  
Buffer Gas ◽  
Single Chip ◽  
Cell Temperature ◽  
Vapor Cell ◽  
Population Trapping

Herein, a microfabricated millimeter-level vapor alkali cell with a high hermeticity is fabricated through a wet etching and single-chip anodic bonding process. The vapor cell, containing Rb and N2, was investigated in a coherent population trapping (CPT) setup for the application of a chip-scale atomic clock (CSAC). The contrast of CPT resonance is up to 1.1% within the only 1 mm length of light interacting with atom. The effects of some critical external parameters on the CPT resonance, such as laser intensity, cell temperature, and buffer gas pressure, are thoroughly studied and optimized. The improved microfabricated vapor cell also exhibited great potential for other chip-scale atomic devices.

Laser pumping magnetic resonance of theory research based on coherent population trapping

2010 ◽  
Author(s):  
Zhang Yang ◽  
Kang Chong ◽  
Qingtao Wang ◽  
Cheng Lei ◽  
Caiping Zheng ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Coherent Population Trapping ◽  
Laser Pumping ◽  
Theory Research ◽  
Population Trapping

scholarly journals Toward a High-Stability Coherent Population Trapping Cs Vapor-Cell Atomic Clock Using Autobalanced Ramsey Spectroscopy

2018 ◽  
Vol 9 (6) ◽  
Author(s):  
Moustafa Abdel Hafiz ◽  
Grégoire Coget ◽  
Michael Petersen ◽  
Cyrus Rocher ◽  
Stéphane Guérandel ◽  
...  
Keyword(s):  
High Stability ◽  
Atomic Clock ◽  
Coherent Population Trapping ◽  
Vapor Cell ◽  
Population Trapping

Control algorithms in quantum frequency standards based on the effect of coherent population trapping

2021 ◽  
pp. 27-31
Author(s):  
Danil A. Paryohin
Keyword(s):  
Frequency Instability ◽  
Coherent Population Trapping ◽  
Metrological Characteristics ◽  
Control Algorithms ◽  
Quantum Frequency ◽  
Operating Modes ◽  
Frequency Standards ◽  
Quantum Frequency Standards ◽  
Tuning Methods ◽  
Population Trapping

The problem of developing control algorithms in quantum frequency standards based on the effect of coherent population trapping is considered. The development of such algorithms will make it possible to create frequency standards with metrological characteristics that are not inferior to the characteristics of rubidium frequency standards, with reduced power consumption and overall dimensions. A method for studying the dependence of the actual value and frequency instability of quantum frequency standards based on the effect of coherent population trapping on the operating modes of individual parts of the standards is presented. As a criterion for optimizing the laser injection current, the output power of the microwave generator, and the cell temperature, we chose to minimize the effect on the shift of the actual frequency of the standard. A comparative analysis of methods for changing the radiation intensity of a surface-emitting laser with a vertical resonator has been carried out and control algorithms have been developed that take into account the features of these methods. Based on these algorithms, software and tuning methods have been developed in quantum frequency standards based on the effect of coherent population trapping. For the prototype standard, the results of measuring the frequency instability are shown. It is shown that control algorithms and tuning methods can qualitatively change the metrological characteristics of quantum frequency standards based on the effect of coherent population trapping.

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