All-optical flip-flop based on coupled SOA-PSW

Abstract

Abstract:The semiconductor optical amplifier (SOA) has obvious advantages in all-optical signal processing, because of the simple structure, strong non-linearity, and easy integration. A variety of all-optical signal processing functions, such as all-optical wavelength conversion, all-optical logic gates and all-optical sampling, can be completed by SOA. So the SOA has been widespread concerned in the field of all-optical signal processing. Recently, the polarization rotation effect of SOA is receiving considerable interest, and many researchers have launched numerous research work utilizing this effect. In this paper, a new all-optical flip-flop structure using polarization switch (PSW) based on polarization rotation effect of SOA is presented.

Design and simulation of all optical shift registers using D flip‐flop

“…In most of the cases, coupled flip-flops are used to realize shift registers. 4 All optical gates are the key logic unit to design optical systems for signal processing. A nonlinear medium is necessary to design all optical gates for signal modulation process to achieve the desired results.…”

“…Optical shift registers received great attention in techniques involving signal processing, especially in cyclic redundant checks to correct transmission errors. In most of the cases, coupled flip‐flops are used to realize shift registers . All optical gates are the key logic unit to design optical systems for signal processing.…”

Modeling of all-optical even and odd parity generator circuits using metal-insulator-metal plasmonic waveguides

“…Although the work is excellent, it still lacks advanced applications in terms of device miniaturization up to a deep subwavelength scale (hence overall design of device remains in thousand of micrometers), and due to the presence of electrical signals for altering the refractive index of waveguides, it limits the speed of device. Some switching circuits were also proposed by using semiconductor optical amplifier (SOA) but they were backsitted due to the phenomenon of gain saturation [21]. All optical logic gates were also proposed using photonic crystal but being lack of the nonlinear material inside the structure will enable the switching of optical signals for complex circuits [22].…”