Dual-wavelength frequency stabilization scheme for high melting temperature atoms

Lanthanide atoms with a large magnetic dipole moment, such as erbium and dysprosium, have attracted significant attention in quantum simulation benefitting from strong dipole-dipole interactions and rich tunability. However, high melting temperature and a narrow linewidth (Γ) of optical transition for laser cooling require a demanding task for stabilizing the frequency of cooling lasers and preparing cold atomic samples. Here, in this poster, we introduce a simple solution of frequency stabilization for high melting temperature atoms, which does not require any additional instrument such as ultra-low expansion cavity, hollow cathode lamp, or iodine cell. With saturation fluorescence spectroscopy on atomic flux, laser frequency can be stabilized to 1Γ for the narrow 583 nm transition of erbium atoms. Detailed analysis and evaluation of the saturated fluorescence spectrum and performance of frequency locking will be presented.