Simultaneous Computation of Arithmetic Logic Operation Based on Polarized Optical Shadow Casting Method

The volume of data is increasing day by day. For data transmission photon has already replaced the electron, but still at transmit and receive ends, devices lose energy while converting electrons into photon and back. So, the concept of optical gates might be a potential resource in the future. In this paper, we theoretically design a two input Arithmetic Logic Unit (ALU) that computes addition, subtraction, AND, OR, XOR operations separately and simultaneously. For design and implementation of optical logic gates Polarized-Encoded Optical Shadow Casting (POSC) algorithm is utilized. Three planes are considered here: source plane, input plane, and output plane. In source plane incoherent Light-Emitting Diode (LED) array works as the light source. We designed the scheme for input pixel, then overlapped those two pixel patterns at the input plane and finally illuminated the overlapped pixel pattern on output screen by light emitting diodes of source plane. By altering the minterm group, various input coding patterns are being calculated. Several equations are obtained from truth table for required operations.