Patent ID: 7639903

Claim:
An electronic system providing daisy-chain optical interconnection among a plurality of circuit boards comprising: a plurality of circuit boards; a plurality of optical cables, each optical cable connected between a pair of the plurality of circuit boards to form a daisy-chain ring, each optical cable having a first end and a second end and a plurality of optical paths between the first end and the second end; and an optical connection matrix disposed on each circuit board, the optical connection matrix comprising: a plurality of optical vias to connect selected optical paths from the first end of a first optical cable to the second end of a second optical cable, a plurality of optical transmitters optically coupled to unselected optical paths at the first end of the first optical cable, a plurality of optical receivers optically coupled to unselected optical paths at the second end of the second optical cable, and wherein the optical paths provide a plurality of optical interconnections among the circuit boards.