In this paper,an optical interconnection data link for PCI bus parallel interconnect has been designed and implemented using semiconductor laser diodes and PIN photo detectors.Current source laser diode driver circuit and photo detector amplification and rectification circuit with wide dynamic range have been designed and implemented on the network interface card,automatic power control of the laser diode has been achieved.Through time division multiplexing,virtual parallel transmission of the PCI bus data in a single fiber has been achieved.