Optical-electronic printed circuit board, parameter determination method, electronic device, and storage medium

A method for determining parameters of a waveguide core in an optical-electronic printed circuit board, wherein the waveguide core comprises a plurality of sidewalls which define a first waveguide segment and a second waveguide segment connected to the first waveguide segment;

• the plurality of sidewalls comprise a first sidewall and a second sidewall disposed opposed to each other in the first waveguide segment, and the first sidewall is parallel to the second sidewall;
• the plurality of sidewalls further comprise at least one third sidewall and at least one fourth sidewall in the second waveguide segment, the first sidewall is adjacent to and intersects one of the at least one third sidewall, the second sidewall is adjacent to and intersects one of the at least one fourth sidewall, the first sidewall and the at least one third sidewall are located on a same side, and the second sidewall and the at least one fourth sidewall are located on a same side, and
• the method comprises:
• determining, according to a refractive index of a material from which the waveguide core is made and a refractive index of a material from which a base layer is made, a critical angle of total reflection at an interface between the waveguide core and the base layer;
• and
• determining the parameters of the waveguide core according to a relative positional relationship between one end port of the waveguide core and the other end port of the waveguide core in the optical-electronic printed circuit board, a condition of a region through which the waveguide core passes, and the critical angle, so that an incident angle of light transmitted through the first waveguide segment and impinging on any one of the at least one third sidewall of the waveguide core is not less than the critical angle, and an incident angle of light impinging on any one of the at least one fourth sidewall of the waveguide core is not less than the critical angle, wherein the parameters of the waveguide core comprise the number of the at least one third sidewalls, the number of the at least one fourth sidewalls, an angle of rotation of each fourth sidewall with respect to a previous sidewall connected thereto, and an angle of rotation of each third sidewall with respect to a previous sidewall connected thereto.