Optimization design method of adiabatic mode converter in optical communication system

The invention relates to the technical field of integrated photoelectronics, in particular to an optimal design method of a heat insulation mode converter in an optical communication system. The defects that an existing heat insulation mode converter is complex in design, not easy to use and the like are overcome. According to the technical scheme, the optimization design method for the adiabatic mode converter in the optical communication system comprises the steps that 1, the waveguide input end width WI and the waveguide output end width WF are determined; 2, carrying out non-uniform segmentation on a device structure to be designed; 3, calculating the length Li of each segment; and 4, constructing each segment, and then splicing and recombining all segments to form a complete waveguide shape. Step 5, obtaining a mode conversion efficiency curve of the whole structure; and step 6, selecting a required device length. The beneficial effects of the invention are that the designed device is small in size and e