Method and device for compensating Coriolis force effect in fluorescence collection

Abstract

The invention discloses a method and a device for compensating Coriolis force effect in fluorescence collection, and belongs to the field of cold atom interference physics. The system comprises a lens set unit used for reducing the influence of stray light and a multi-pixel silicon PIN photodiode used for positioning the atomic space position. A fluorescence signal emitted by stimulated radiation of an atomic group in a vacuum cavity is detected, the enhanced fluorescence signal is collected by a multi-pixel array detector, the radius of the atomic group is obtained through fitting of an approximate Gaussian curve, a gravitational acceleration deviation value is calculated through a Coriolis force formula, compensation of a gravitational acceleration value is completed in combination with an experimental test value, and the measurement accuracy is improved. The Coriolis force effect is overcome, the measurement precision and uniformity are further improved, and the physical parameter measurement, the signal-to-noise ratio and the measurement accuracy in the fluorescence detection process in the field of cold atom physics are greatly improved. The device has the advantages of background light resistance, high signal-to-noise ratio, compact structure, good stability, low manufacturing cost, convenience in use, high adjustment sensitivity and the like.

Description

technical field [0001] The invention relates to a device for collecting atomic final state fluorescence, which belongs to the field of cold atom interference physics. Background technique [0002] In recent years, there have been more and more researches on the application of cold atoms, mainly due to the longer wavelength of cold atoms, the strong coherence of cold atomic groups, and the fine manipulation, and when the temperature of cold atoms is lower than the critical temperature of condensation, cold atomic groups form Bose- The Einstein condensate will present more characteristics. Therefore, the study of cold atomic physics is of great significance to quantum computing, quantum information storage, quantum precision measurement, atomic interferometry and other fields. [0003] In cold atom experiments, the manipulation and detection of cold atoms is very important. Take the cold atom interference gravimeter as an example. During the falling process of atomic clusters...

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Problems solved by technology

[0004] In order to solve the shortcomings of the existing fluorescence detection device inhomogeneous detection, improve the accuracy of fluorescence detection, and meet the needs of its use in the field of cold atomic physics, the main purpose of the present invention is to provide a method for compensating the Coriolis force effect in fluorescence collection and devices, improve the detection accuracy and uniformity of fluorescence detection, and greatly improve the physical parameter measurement, signal-to-noise ratio and measurement accuracy in the fluorescence detection process in the field of cold atomic physics

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