Complementary logic interface for high performan optical computing with OLUT

The Optical LUT (OLUT) has been proposed as a parallel and energy-efficient logic architecture for building prospective on-chip optical FPGAs in order to replace traditional power-hungry electronic computing circuits. In this paper, we present a new OLUT implementation that computes a pair of complementary Boolean logic functions through wavelength multiplexing, allowing the computational capacity to be doubled for a reasonable optical power and area overhead depending on the OLUT size. Worst-case evaluation of the optical laser power needed to perform reliable logic operations demonstrates the potential of the proposed OLUT for energy- and hardware-efficient photonic reconfigurable computing.