35 results about "Hyperfine structure" patented technology

The invention discloses an atomic ground state hyperfine Zeeman frequency measuring device and method, belonging to the field of atomic frequency standard. The atomic ground state hyperfine Zeeman frequency measuring device comprises an optical radiation module, a filtering module, a fission transition module, an optical detection module and a main control computation module, wherein the optical radiation module is used for enabling an atom generate radiation light; the spectral line of the radiation light comprises two hyperfine structural components; the filtering module is used for filtering out one of the two hyperfine structural components by using an isotope of the atom so as to obtain the filtered radiation light; the fission transition module is used for performing fission and resonance transition on the atom in a microwave cavity under the action of the magnetic field and a radio frequency signal and under the radiation of filtered radiation light; the atom in the microwave cavity is the same as the atom in the optical radiation module; the optical detection module is used for detecting the intensity of the radiation light penetrating through the fission transition module in real time and generating a light intensity signal; the main control computation module is used for supplying the radio frequency signal to the microwave cavity, obtaining an absorption spectral line of the atom according to a corresponding relationship between the radio frequency signal and the light intensity signal and computing the atomic ground state hyperfine Zeeman frequency according to the absorption spectral line.