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Rubidium atomic clock with compound-eye stacked densely packed multi-bubble structure atomic gas cell

A technology of atomic gas chamber and rubidium atomic clock, applied in the field of atomic clocks, can solve the problems of slow optimization of long-term frequency stability and no breakthrough progress

Active Publication Date: 2019-05-07
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For decades, the research on the long-term frequency stability of rubidium atomic frequency standards at home and abroad has continued to be slowly optimized, but no breakthrough has been made

Method used

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  • Rubidium atomic clock with compound-eye stacked densely packed multi-bubble structure atomic gas cell
  • Rubidium atomic clock with compound-eye stacked densely packed multi-bubble structure atomic gas cell
  • Rubidium atomic clock with compound-eye stacked densely packed multi-bubble structure atomic gas cell

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 The shown rubidium atomic clock includes an external magnetic shield 9 and a base 1 arranged inside the outer magnetic shield 9 for installing various components, a rubidium pumping spectrum lamp 2 is arranged on the base 1, and a rubidium ultrafine filter is arranged along the direction of its optical path Bubble 3, atomic gas chamber and photodetector 8.

[0031]The atomic gas chamber is arranged in the microwave cavity 5, and the microwave cavity 5 and the photodetector 8 are connected by a circuit system. The circuit unit of the circuit system is equivalent to a frequency locked loop, which is used to lock the internal output frequency on the reference frequency of the atomic gas chamber. The structure of the circuit system belongs to the existing technology in this field, and can refer to the records in "Principles of Quantum Frequency Standards".

[0032] The light emitted by the rubidium pumping spectrum lamp as the light source is filtered by ...

Embodiment 2

[0037] In order to further optimize the structure and performance of the rubidium atomic clock, the structure is as follows figure 2 The rubidium atomic clock shown. Different from Embodiment 1, (1), replace the rubidium pumping spectrum lamp 2 and the rubidium ultra-fine filter bubble 3 as the light source of the rubidium atom lamp with the frequency-stabilized laser 11; (2), adopt such as Figure 5 The structure shown is a modified rubidium atom gas cell.

[0038] The improved rubidium atom gas cell is in Figure 4 A further second glass envelope 25 is provided on the basis of the shown rubidium atom gas cell, and the glass envelope 22 is fixed in the second glass envelope 25 by a bracket 26 . During manufacture, the two layers of glass shells are evacuated through the second exhaust hole 24 reserved on the second glass shell 25 to further improve the thermal insulation effect of the inner glass shell, thereby solving the problem of rubidium atoms to a greater extent. Th...

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Abstract

The invention provides a rubidium atomic clock of an atomic gas chamber with a compound-eye type stacked dense multi-bubble structure. The atomic gas chamber is an atomic gas chamber with the compound-eye type stacked dense multi-bubble structure and comprises a glass shell and a medium, the glass shell is filled with the medium and internally provided with a plurality of micro-atomic bubbles formed by glass walls and stacked in a dense and compound-eye mode, and the micro-atomic bubbles are filled with rubidium atoms and buffer gas. The whole atomic gas chamber formed by the multi-bubble structure replaces single-bubble atomic gas chambers to achieve the function of balancing the temperature drift and pressure frequency shift of an alkali metal atomic gas chamber, and therefore the constraints caused by the temperature and pressure changes of rubidium absorbing bubbles on the long-term frequency stability index of a rubidium atom frequency standard are effectively solved. The rubidiumatomic clock can solve the problem troubling technicians in the field for a long time in the world that the long-term frequency stability of bubble-type rubidium atoms is influenced by the temperature drift and pressure frequency shift of the single-bubble atomic gas chambers.

Description

【Technical field】 [0001] The present invention relates to atomic clocks, especially rubidium atomic clocks. Specifically, the present invention relates to a rubidium atomic clock with compound-eye stacked dense multi-bubble structure atomic gas cells. 【Background technique】 [0002] As a very stable frequency source, atomic clocks are playing an increasingly important role in modern life. Timekeeping, time service, global navigation and positioning, network synchronization, communication and other fields are inseparable from atomic clocks. According to reports, the newly developed optical frequency atomic clock has a stability of 10 to the minus 19th power. The microwave rubidium atomic frequency standard is an early and mature class among various atomic frequency standards. The first microwave rubidium atomic frequency standard was born in 1960. A few years later, the first commercial rubidium atomic frequency standard appeared and was soon used in satellite navigation a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04F5/14
CPCG04F5/14
Inventor 陈景标常鹏媛
Owner PEKING UNIV
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