Statistical method and device for output energy distribution of waveguide transition region, equipment and medium

The invention discloses a statistical method and device for output energy distribution of a waveguide transition region, equipment and a medium. The waveguide comprises a coupling-in region, a transition region and a coupling-out region; a first final emergent light beam of the coupling-in area is transmitted along a first direction and a second direction after entering the transition area, and a second final emergent light beam transmitted along the second direction or the first direction is transmitted to the coupling-out area; the statistical method comprises the following steps: quantifying two light beams in a first direction and two light beams in a second direction of a minimum quadrilateral unit which can be surrounded by neighbors into a Sudoku matrix according to a diffraction step length of a transition region; based on the direction and energy of the first final emergent light beam, the diffraction step length, the plurality of Sudoku matrixes and a preset recursion relation, obtaining a light pro