Light guide configuration for serial bi-directional signal transmission, optical circuit board, and fabrication method

An optical circuit board, comprising:

• a plurality of parallel light guide configurations each for serial bi-directional signal transmission, each of said light guide configurations having:
• an optical signal line having a main direction, said signal line carrying electromagnetic radiation along said main direction;
• a plurality of optical accesses disposed at said signal line along said main direction for coupling the electromagnetic radiation along a direction substantially perpendicular to said main direction;
• and
• a plurality of diffusers disposed inside said signal line, each of said diffusers respectively allocated to one of said optical accesses, and each of said diffusers carrying a portion of the electromagnetic radiation in said signal line to a respective one of said optical accesses for:
• coupling the portion of the electromagnetic radiation out of said signal line from a respective one of said diffusers through said respective one of said optical accesses;
• and
• launching incident radiation arriving through a respective one of said optical accesses into said signal line through said respective one of said diffusers.

A method for fabricating an optical circuit board, which comprises:

• creating a plurality of parallel trenches in a circuit board having at least two sides, the trenches having side surfaces;
• placing a reflection layer on the side surfaces of the trenches;
• generating optical signal lines by filling the trenches with a transparent vitreous material;
• creating v-shaped trenches perpendicular to the optical signal lines in at least one of the sides of the circuit board;
• generating diffusers in the optical signal lines by aluminizing the v-shaped trenches;
• and
• aluminizing the optical signal lines in regions except for optical access regions disposed opposite the v-shaped trenches.