Broad-spectrum laser-pumped rubidium atomic microwave clock based on narrow pulse modulation broadening

Abstract

The invention provides a wide-spectrum laser pumping rubidium atom microwave clock based on narrow pulse modulating broadening. The rubidium atom microwave clock comprises a pump light source, rubidium atom bubbles (3) and a photoelectric detector, wherein pump light generated from the pump light source is wide-spectrum laser obtained by modulating laser of a laser device (1) by a narrow pulse signal , the line width of the wide-spectrum laser is 1 gigahertz, a weight frequency spectrum interval is 5 megahertz, the range of the pulse width of the narrow pulse signal is 0.2-5 nanoseconds, and the pulse interval is 0.1-1 microsecond. The wide-spectrum laser pumping rubidium atom microwave clock based on the narrow pulse modulating broadening has the advantages that by adopting a pulse modulation technology to broaden the line width of the laser and applying the pulse modulation technology to the pumping light source of the rubidium atom microwave clock, almost atoms in all speed groups can be covered, thereby increasing the amount of the rubidium atoms pumped by the laser, improving the signal to noise ratio of the rubidium atom microwave clock, so that it can be achieved that the wide-spectrum laser pumping rubidium atom microwave clock based on the narrow pulse modulating broadening has better short-term stability.

Description

【Technical field】 [0001] The invention belongs to the technical field of microwave atomic clocks and microwave frequency standards, and in particular relates to a wide-spectrum laser-pumped rubidium atomic microwave clock based on pulse modulation. 【Background technique】 [0002] As a secondary frequency standard, the rubidium atomic bubble microwave clock is widely used in research fields such as satellite navigation and positioning, high-speed network communication, and precision measurement due to its small size, low power consumption, and high reliability. Existing laser-pumped rubidium atomic microwave clocks use the advantages of semiconductor lasers such as pure spectrum, narrow linewidth, and high power spectral density, and use semiconductor lasers instead of electrodeless discharge lamps as the pumping light source, which can improve the utilization of atoms, thereby improving the efficiency of the system. short-term stability and optimize long-term stability perfo...

AI Technical Summary

Problems solved by technology

[0003] However, the traditional laser-pumped rubidium atomic microwave clock has a narrow pumping laser linewidth, generally hundreds of kHz to several MHz, and the Doppler broadening of atoms reaches hundreds of MHz, or even GHz, so the laser is only about One-fiftieth of the atoms interact, and the effective utilization rate of the atoms is low, which limits the signal-to-noise ratio of the system, thereby limiting the further improvement of the short-term stability of the rubidium atomic microwave clock

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