Chip-type atom gyroscope and rotation measuring method thereof

Abstract

The invention discloses a chip-type atom gyroscope and a rotation measuring method thereof. The gyroscope comprises an atom chip, a glass vacuum cavity, an ion pump, a current feedthrough device, a vacuum valve and a four-way joint, wherein four openings of the four-way joint are respectively connected with the glass vacuum cavity, the ion pump, the current feedthrough device and the vacuum valve; the atom chip is connected to the glass vacuum cavity; and a wire structure on the atom chip comprises a plurality of wire arrays consisting of wires which are parallel to one another along a direction y, two wires along a direction x and two groups of coplanar microwave waveguides along the direction x. According to the method, three-dimensional atom captivity potential well is generated on the surface of the atom chip, cold atoms are loaded into the captivity potential well, the cold atoms with different internal states are separated from one another and combined together by the two groups of coplanar microwave waveguides when the cold atoms are moved by the wire arrays, and a rotation speed is calculated according to a sagnac effect theory. The gyroscope is convenient to carry, high in sensitivity and wide in application prospect, and the loop area of the gyroscope can be superposed.

Description

technical field [0001] The invention relates to a gyroscope and a method for measuring rotation thereof, in particular to a chip-type atomic gyroscope and a method for measuring rotation thereof, belonging to the technical fields of rotational speed measurement and inertial navigation. Background technique [0002] At present, the gyroscopes used for rotation measurement and inertial navigation are mainly optical gyroscopes. The principle is to use the movement of interference fringes caused by the rotation-induced Sagnac effect in the optical interference loop to measure the rotation speed: [0003] Φ = 4 πm h S • Ω [0004] Among them, S is the area surrounded by the interference loop, Ω is the speed of rotation, and m is the mass of photon or atom. [0005] The optical gyroscope can be easily miniaturized and practical, but its shortcoming is mainl...

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Problems solved by technology

[0006] There are usually two types of such atomic gyroscopes realized internationally: thermal atomic beam gyroscopes and cold atomic gyroscopes. Large and complex, it is often difficult to realize practical application

[0007] In order to realize the miniaturization and practicality of the atomic gyroscope, it has been proposed to use the atomic chip to realize the gyroscope, such as the invention patent of Chinese Patent No. state independent, it is difficult to achieve 50% coherent beam splitting, and the initial internal state is the same, there is no way to eliminate the common-mode phase during interference, so the rotation speed can only be measured in an ideal state, which cannot be really applied

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