Method for pumping rubidium bubble for outputting standard frequency by lamp pump rubidium gas laser and rubidium atomic clock

Abstract

The invention relates to a method for pumping a rubidium bubble for outputting standard frequency by a lamp pump rubidium gas laser and a rubidium atomic clock. The method comprises the following steps of: adopting a filtered rubidium gas electrodeless lamp as a pumping light source for pumping a rubidium gas atom in an atom steam chamber, realizing distribution quantity conversion and then forming a lamp pump rubidium gas laser under the action of a laser resonant cavity; carrying out laser pumping on the rubidium bubble arranged in a microwave cavity by utilizing the lamp pump rubidium gas laser and detecting the transition probability of the pumped rubidium atom for generating transition by generating interaction with a microwave field in the microwave cavity by utilizing the lamp pump rubidium gas laser; and locking microwave frequency fed in the microwave cavity according to the detected transition probability and locking the microwave frequency fed in the microwave cavity on clock transition frequency of the atom. In the embodiment of the invention, because the frequency of the lamp pump rubidium gas laser still operates on a rubidium transition spectral line broadening spectrum in an unlocking state, even if the frequency of the lamp pump rubidium gas laser is unlocked, the lamp pump rubidium gas laser can be rapidly locked on needed laser frequency.

Description

technical field [0001] The invention relates to an atomic clock and frequency standard technology, in particular to a method for pumping a rubidium bubble with a lamp-pumped rubidium gas laser to output a standard frequency and a rubidium atomic clock, belonging to the field of laser technology. Background technique [0002] After half a century of development, international bubble-type rubidium atomic clocks using rubidium atomic spectrum lamps for optical pumping and light detection have reached the performance limit. In order to break through the performance limit of the rubidium atomic clock, and to overcome the low signal-to-noise ratio and low pumping efficiency when the rubidium atomic spectrum light pumps the rubidium atomic clock, as well as the atomic clock frequency caused by the light intensity and spectral line shape of the pumping spectrum lamp changing with time The deterioration of the stability, the existing technology uses the semiconductor laser to replace...

AI Technical Summary

Problems solved by technology

Furthermore, even if the semiconductor laser is locked on the rubidium spectral line, the semiconductor laser will still lose lock due to vibration, temperature change, etc. and its operating frequency will drift away from the rubidium atomic spectral line, eventually resulting in the failure to automatically restart without manual re-intervention inspection. Locking the semiconductor laser on the desired rubidium spectral line is an insurmountable limitation for semiconductor laser-pumped rubidium atomic clocks for autonomous applications

The above-mentioned defects of semiconductor lasers bring great hidden dangers to the long-term stability of the system for semiconductor laser-pumped rubidium atomic clocks

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