Nuclear magnetic resonance gyroscope device for improving atomic polarization uniformity

Abstract

The invention discloses a nuclear magnetic resonance gyroscope device for improving atomic polarization uniformity. The device comprises an atomic vapor chamber, a non-magnetic heating device, a magnetic shielding device, a three-dimensional magnetic field coil, a pump light laser, a first polarizer, a first lambda / 4 wave plate, a second lambda / 4 wave plate, a first reflector, a probe light laser,a second reflector, an acousto-optic modulator, a diaphragm, a second polarizer, a lambda / 2 wave plate, a Wallstone prism, a differential photodetector, a first lock-in amplifier, a second lock-in amplifier, and a computer. With the device of the invention adopted, the problem of the non-uniformity of atomic polarization in a nuclear magnetic resonance gyroscope can be solved, and a guarantee isprovided for improving the detection sensitivity of the nuclear magnetic resonance gyroscope.

Description

technical field [0001] The invention belongs to the technical fields of optical detection and inertial navigation, and in particular relates to a nuclear magnetic resonance gyroscope device for improving the uniformity of atomic polarization. Background technique [0002] The real-time detection and adjustment of attitude information of moving objects, such as ships, aircrafts and satellites, is an important task in inertial navigation. Attitude information mainly includes three aspects: position, acceleration and rotation rate, where the information of rotation rate is generated by the gyroscope. [0003] There are many kinds of gyroscopes. Traditional gyroscopes use the Coriolis force effect, which has the advantage of high precision, but the disadvantage is that because the rotor is a moving part, it is easy to be damaged by collision when the object is accelerating violently. Some occasions (such as high-acceleration spacecraft or aircraft) are prone to failure. The fi...

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Problems solved by technology

[0005] In the process of pumping alkali metal with a single pump light, after the laser enters the atomic vapor chamber, as it is absorbed by the atoms, the light intensity will gradually decrease along the direction of light propagation. At different positions in the atomic vapor chamber, the pump light The intensity of the optical pump is different, the efficiency of the optical pump will also be different, the polarization of the inert gas nucleus will also have a gradient difference, and the generated macroscopic magnetic moment will also produce a gradient, which affects the sensitivity of the detection.

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