Transmission model of space-time coherent vortex in dispersive medium and coherence regulation and control method thereof

The invention relates to the technical field of optics, in particular to a transmission model of space-time coherent vortex in a dispersive medium and a coherence regulation and control method based on the model. Inserting a space-time vortex phase into a mutual coherence function of a partial space coherence and partial time coherence pulse light source to construct a new mutual coherence function, then substituting the new mutual coherence function into a generalized Huygens-Fresnel diffraction ABCD transmission formula under a dispersive medium condition, and performing operation to obtain a mutual coherence function expression at a transmission distance z; according to the definition of the space-time complex coherence degree, solving an expression of the space-time coherence vortex coherence degree and drawing a phase distribution diagram of the space-time coherence vortex coherence degree; determining the vortex core position of the space-time coherent vortex by using the intersection point of the compl