Analysis On The Phase Shift And Sensitivity Of Gyroscope Based On Atom Interferometer

Navigation technology is essential for aircraft. Nowadays, there are several kinds of methods for navigation, including inertial and radio navigation, satellite navigation, and celestial navigation. Inertial navigation is one kind of autonomous navigation, whose key technology is gyro. Due to its autonomous navigation capability in any environment, gyro has received intensive attention and extensive investigation since it was presented. At present it is widely used in maritine, aviation, aerospace, military and other fields.This thesis analyzed the phase shift and sensitivity relations of quantum gyroscope based on atom interferometer, which was built on the theory of optical Sagnac effect and atomic interferometer. We went through the expression of Sagnac effect, from the two perspectives of classical mechanics and special theory of relativity respectively, and introduced the basic principle of the atom interferometer. For the key role the phase information plays in the interferometer, it is significant to clearly explain every part contributing to the total phase shift. As we have done in the third chapter of the thesis. Moreover, Sagnac phase shift related to the rate of rotation was presented under a dual atomic beam matter-wave gyroscope. Finally, we analyzed the factors that affected the sensitivity, including the phase noise of Raman pulse as well as cold atoms; several methods for improving the short-term sensitivity were discussed.