Optically Reconfigurable Gate Arrays (ORGAs) offer the possibility of providing a virtual gate count that is much larger than those of currently available VLSIs by exploiting the large storage capacity of holographic memory. We developed an Optically Differential Reconfigurable Gate Array (ODRGA-VLSI) with no overhead and fast reconfiguration capability. This paper presents the results of development of a perfect optical reconfigurable system with the ODRGA-VLSI chip and holographic memory. Experimental results of the reconfiguration procedure and circuit performance on a gate array are also presented. © 2006 IEEE.