Optical comparators can play crucial roles in the all-optical digital circuits required for optical
calculation and optical processing. A typical digital comparator is a logic circuit that can …

Optical comparators are essential elements required for creating all optical digital systems
used in optical data processing. A new structure is proposed for designing a 1-bit optical …

A comparator is one of the important combinational logic circuits. An optical comparator was
designed and simulated based on photonic crystals. Point and linear defects were also used …

Optical analog to digital conversion is very important for implementing all-optical data
processing systems. In this study, we designed an all-optical analog to digital converter …

We propose an all optical 1-bit comparator design based on the two dimensional (2D)
photonic crystal ring resonator (PhCRR) coupled to six optical waveguides. The two …

In this paper, a 2-to-4 all-optical decoder based on photonic crystal ring resonators is
introduced. The photonic crystal structure has a 2D square chalcogenide rod lattice whose …

Optical encoders are one of the important optical logic devices required in optical
communications and optical signal processing. In this paper, we proposed a novel structure …

Using optical beam interference inside photonic-crystal-based waveguides is a promising
method for designing and realizing all-optical logic gates and other digital devices. In this …

In this paper, we proposed a structure to realize an all-optical digital multiplexer. The
proposed structure had two inputs, one control and one output port. Using the control port …

A new design for concurrent implementation of all-optical half-adder and AND & XOR logic
gates based on nonlinear photonic crystal ring resonator has been proposed. The finite …