| In cold atom interference experiments, the atoms need to be cooled and manipulated by laser, so the frequency stability of semiconductor lasers is required. Because of the large linewidth, poor power stability, slow drift and mode hopping, it is necessary to stabilize the frequency of semiconductor lasers. This paper introduces six common frequency stabilization methods in cold atom interference experiments, including saturated absorption spectrum stabilization, wavelength modulation frequency stabilization, modulation spectrum frequency stabilization, modulation transfer spectrum frequency stabilization, two-color laser frequency stabilization and frequency-voltage conversion frequency stabilization. The principles, characteristics and application fields of these methods are described respectively, which provide reference for the practical application of semiconductor lasers. |
