Method and device for detecting cooling temperature, flight speed and motion trajectory of atomic groups

Abstract

The invention discloses a detection device of radical cooling temperature, flying speed, and movement track. The detection device comprises a detection light path system and a single acquisition system; the detection light path system comprises an incident optical fiber (11), a beam expanding and collimation system (12), a diaphragm (13), and a reflector (14); the single acquisition system comprises a focusing lens (21), a photodiode PD (22), and a CCD (23); three intersection areas of three flake-like parallel light beams, which are formed via illuminating of the diaphragm (13) by the beam expanding and collimation system (12), with the radical movement track are taken as detection areas. The detection method and device are skillful is design, and simple in structure, can be used for detection of radical cooling temperature, flying speed, and movement track with a single detection device, and improving atom laser gyroscope performance further.

Description

technical field [0001] The invention relates to the technical field of cold atom interference, in particular to a method and device for detecting the temperature, motion speed and motion trajectory of atomic groups. Background technique [0002] Atomic gyroscopes are increasingly becoming the mainstream development direction in the field of inertial navigation due to their higher theoretical measurement accuracy. The precise control of atomic trajectories is the prerequisite for the realization of accurate measurement of atomic gyroscopes. For the atomic gyroscope projected in one direction, it is necessary to precisely control the positional relationship between the atomic trajectory and the optical path system; for the atomic gyroscope projected in two directions, it is necessary not only to ensure the positional relationship between the atomic trajectory and the optical path system, but also to ensure the coincidence of the atomic trajectories of the two groups. degrees, ...

AI Technical Summary

Problems solved by technology

Among them, the "time-of-flight method" is mainly used to detect the cooling temperature of atoms, and cannot realize the detection of the trajectory of atoms. The doctoral dissertation of Zhou Minkang of Huazhong University of Science and Technology in 2011 and the doctoral dissertation of Han Shunli of Zhejiang University in 2010; and the direct digital frequency integrated control can only be accurate control the flight trajectory of atoms, but cannot realize the precise measurement of atomic trajectory, such as the article "Control of atomic trajectory in throwing cold atom gyroscope" published by Wuhan Institute of Physics and Mathematics

[0005] The cooling temperature of atoms is an important indicator of the quality of atomic trapping. The ejection velocity of atomic clusters affects the measurement phase, and the precise control of atomic trajectory is the prerequisite for high-precision measurement of atomic gyro. At present, these three parameters have not been realized under the condition of a single device. measurement technique

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