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Rubidium atomic clock with high contrast ratio frequency discrimination signal

A high-contrast, rubidium atomic clock technology, applied to instruments using atomic clocks, etc., can solve problems affecting the performance of atomic clocks, achieve the effects of improving detection sensitivity, improving stability, and reducing noise

Active Publication Date: 2012-11-28
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of optical frequency shifts affects the performance improvement of atomic clocks

Method used

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  • Rubidium atomic clock with high contrast ratio frequency discrimination signal
  • Rubidium atomic clock with high contrast ratio frequency discrimination signal
  • Rubidium atomic clock with high contrast ratio frequency discrimination signal

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0025] see first figure 2 , figure 2 is the loop diagram of an atomic clock. As can be seen from the figure, the composition of the present invention includes a controlled crystal oscillator 1, a frequency multiplier synthesizer 2, a modulation oscillator 3, a DC amplifier 4, a quantum system 5 and a phase detector 6, and the connection relationship of the above-mentioned components is as follows:

[0026] The input terminal of the controlled crystal oscillator 1 is connected to the output terminal of the DC amplifier 4, the first output terminal of the controlled crystal oscillator 1 provides a standard frequency output, and the second output terminal of the controlled crystal oscillator 1 is connected to the The first input terminal of described frequency multiplier s...

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Abstract

The invention discloses a rubidium atomic clock with a high contrast ratio frequency discrimination signal. The rubidium atomic clock comprises a controlled crystal oscillator, a frequency multiplication synthesizer, a modulation oscillator, a direct current amplifier, a quantum system and a phase detector, wherein a first Glan-Taylor polarizer is placed on a light path between a beam expander and a physical device; a second Glan-Taylor polarizer is placed between the physical device and the photoelectric detector; and the first Glan-Taylor polarizer and the Glan-Taylor polarizer are orthogonally placed. The transmission backlight intensity is filtered, the first order light frequency shift is eliminated, and the contrast ratio of the frequency discrimination and the rubidium atomic clock property are improved. The high performance atomic clock is provided for satellite navigation, communication and precision measurement.

Description

Technical field [0001] The present invention relates to a passive optical pumping bubble type rubidium atomic clock, in particular to a rubidium atomic clock with a high contrast frequency identification signal. Background technique [0002] The development history of atomic clocks can be traced back to around World War II. It mainly benefited from the rapid development of quantum mechanics and microwave spectroscopy at that time. Early microwave clocks used incoherent light sources as pump light and detection light. Later, with the development of lasers, laser state selection and detection methods were applied to atomic clock research in order to obtain better results. Rubidium atomic frequency standards have been widely used due to their high short-term stability, small size, and portability. Existing optically pumped rubidium atomic frequency standards generally adopt a three-level structure, such as figure 1 shown. (Reference: J. Vanier & C. Mandache. The passive opt...

Claims

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Application Information

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IPC IPC(8): G04F5/14
Inventor 林锦达王育竹邓见辽李琳何慧娟
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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