Experimental Investigation Of The Optical System For Bragg Diffraction Atom Interferometers

Atom interferometers are widely applied in precise measurement physics,such as measurement of inertial parameters,measurement of fundamental constants in physics,and test of fundamental laws in physics.Based on the Bragg diffraction scheme,the large momentum transfer of atoms can be realized,which greatly improves the measurement sensitivity of an atom interferometer.Bragg diffraction is an important option for implementation of high-precision atom interferometers in future.In this thesis,according to the special requirement of atom interferometers for optical system,an experimental study on the optical system for Bragg diffraction based atom interferometers is carried out.The main results obtained are as follows:1.The realization scheme of the atom interferometer is analyzed and compared in detail.The experimental parameter requirements of the Bragg diffraction based atom interferometers were analyzed theoretically,and the special requirement for the laser output power and the beam spectrum is analyzed emphatically.2.An optical frequency quality analysis device based on rubidium vapor resonance absorption system was design and implemented.The spectrum of the output beam of the laser used in the atom interferometer was detected and analyzed by using this device,and the parameters of the laser were optimized.3.According to the problem that more frequency components and lower efficiency of laser beams used in atom interferometers,a multi-frequency time-division multiplexing laser amplification control system was designed and realized.The preparation of the optical system required for the Bragg diffraction atom interferometer was completed.