In this paper; we discuss the optical fiber interconnection rech. nologlesappbedinthem, orypes of parallel pmcessing systems 1) u backplane intercotmectian in a parallel processor array system and 2) a computing cluster network We have get up a parallel procesor array system using optical fiber to make point4o-pomt interconnection between procesror elements and are develomng a low cost virtnal parallel optical fiber interonnection hnk (VPOFLblb) complying with pertpberal component interconnect (PCI) local bus specifications for tbe computing cluster VPOFLink is integrated with tbe popular PCI bus interface in order to make the link hold the same bandwidth as that of the PCI bus It was fabricated as an available peripheral device that can been inserted rata the bus xlots of commercial computers directly and can operate under the control of PCI bus Also in this paper, we demonsate the optical fiber link for a ring network and the arcbitecture of the ring network