All-optical logic gates containing a two-mode nonlinear waveguide

A Review on System on Chip Optical Logic Gates

“…Recently, different methods have been demonstrated for optical logic gates such as two-mode nonlinear waveguide [4], multi branch waveguide structure with localized optical nonlinearity [5], quantum dots [6], multimode interference in SiGe/Si [7]. There are many limitations of these methods such as big size, simultaneous output, difficult to perform chip scale integration.…”

All Optical Logic Gates Based on Two Dimensional Plasmonic Waveguides with Nanodisk Resonators

“…Some of these devices employ the effects of electro-optic or magneto-optic by applying respectively an electric or magnetic field, which has some disadvantages in switching time, loss and size [27,28].…”

All-optical combiner-splitter and gating devices based on straight waveguides

“…These effects, either singly or together, can produce significant control problems in the case in which the optical transistors are sequentially cascaded in the manner of electronic transistors. Also recently, an all-optical logic gate has been proposed by Yabu et al [3] consisting of a modified MachZehnder interferometer with a nonlinear section in one arm (analogous to a commercial electro-optic MachZehnder modulator). The gating properties of this device were determined by simulation.…”

“…Specifically, we replace the curved entrance and exit channels of the usual Y splitters and combiners used in Refs. [1] and [3] with straight waveguides of different widths, designed to couple to only one of the distinct modes of a two-mode channel supporting both a symmetric and an antisymmetric mode. The resulting device allows two signals of the same (or different) wavelength to be combined into a single channel and subsequently separated after an arbitrary propagation length, without change in either signal.…”

“…As an example, we then apply our design to the all-optical logic gate introduced in Ref. [3]. The required analysis is summarized in Section 3, and the results obtained in this case for a given set of parameters are discussed in Section 4.…”