This paper describes a new optical link system which consists of a metal optical bench, a module printed circuit board, a driver/receiver integrated circuit, a vertical-cavity surface-emitting laser/photo diode (VCSEL/PD) array, and an optical link block with plastic optical fibers for reducing electromagnetic interference (EMI) noise. Optical connections are made between light sources and detectors. Because of optical wiring method no EMI noise will occurs and also the assembly of the system is easy. This method can provide robust, cost-effective, and easy-repair. This method successfully achieved a 4.5 GB/s data transmission rate without EMI problems.