Computing system

A computing system, comprising a plurality of computing devices, each computing device comprising a plurality of computing modules and a plurality of optical interconnection expansion cards, each optical interconnection expansion card comprising at least one on-chip optical switch and at least one first optical switching unit,

• wherein the at least one on-chip optical switch is configured to enable communication among the plurality of computing modules within the same computing device;
• wherein the plurality of optical interconnection expansion cards of the plurality of computing devices are communicatively connected through optical fibers;
• and
• wherein the at least one first optical switching unit is configured to selectively transmit a signal from the plurality of computing modules to the at least one on-chip optical switch or to the optical fibers.