  In this paper, we demonstrate a domain inversion crystal structure to study
the cascaded three-wave mixing process in a two peak Stark-chirped rapid
adiabatic passage. We have achieved efficient wavelength conversion, which can
be performed in intuitive order and counterintuitive order. The requirement of
crystal is reduced and the flexibility of structure design is improved. When
the conversion wavelength is fixed, increasing the coupling coefficient between
the two peaks can reduce the intensity of the intermediate wavelength while
maintaining high conversion efficiency. Compared with the cascaded wavelength
conversion process based on stimulated Raman rapid adiabatic passage, the
two-peak Stark-chirped rapid adiabatic passage has a larger convertible
wavelength bandwidth. This scheme provides a theoretical basis for obtaining
mid-infrared laser source via flexible crystal structure.
