All optical half adder/subtractor using dark‐bright soliton conversion control

Abstract

We propose a new design of all‐optical circuit using microring and nanoring devices, in which the simultaneous operation of half adder/subtractor arithmetic can be formed by using the dark‐bright soliton conversion control within the system. The input logic “0” and “1” are performed by using dark and bright soliton pulses, respectively. By using the dark‐bright soliton conversion behavior with in the π/2 phase shift device (i.e., an optical coupler), the arithmetic unit can perform simultaneously at the drop‐ and through‐ ports, respectively. In application, the proposed concept can be recognized as a simple and flexible scheme for performing the logic switching system, which can be used for advanced logical system. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26039

All-Optical Binary Full Adder Using Logic Operations Based on the Nonlinear Properties of a Semiconductor Optical Amplifier

“…The operation of a half adder/subtractor arithmetic using dark-bright soliton conversion control has been reported by Phongsanam et al [7]. Many designs for a single adder or adder with subtractor have been proposed using a semiconductor optical amplifier (SOA) and periodically-poled lithium niobate (PPLN) waveguide [8], a microring resonator [9], exploitation of four-wave mixing (FWM) in a SOA [10], a three-state system [11], a terahertz optical asymmetric demultiplexer (TOAD) [12], a single-slot waveguide [13], two SOAs [14], and an SOA assisted by an optical bandpass filter [15].…”

All-Optical Logic and Arithmetic Operators Designed by Modified Add-Drop Filter

“…The nonlinear optical pulse input and control fields at the input and add ports of the modified add-drop filter are formed by the nonlinear dark pulse (D) and nonlinear bright pulse (B), which are given by reference [18] as shown in equations (5) -(6), respectively.…”

Ultrafast All-Optical Full Adder Using Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

“…All-optical binary adders using many optical designs, such as terahertz optical asymmetric demultiplexers (TOADs) [15] and ultrafast nonlinear interferometers [16], have been reported. An alloptical half adder using an SOA-assisted Sagnac interferometer has been suggested and demonstrated by several groups of researchers [17][18][19].…”

“…A scheme for an ultrahigh-speed all-optical half adder based on four-wave mixing in SOAs has been demonstrated by Li et al [17]. The operation of a half adder/subtractor arithmetic using the darkbright soliton conversion control has been reported by Phongsanam et al [18]. Menezes et al have suggested all-optical half adder using the symmetric planar three-core non-linear directional coupler, operating with a short light pulse [19].…”