Optoelectronic Logical Gates “AND”, “OR” and “NOT”

Abstract

Optoelectronic AND, OR and NOT logical gates were composed of thin film photoconducting and electroluminescent elements, made of cadmium sulphide and zinc sulphide, respectively, doped with copper, chlorine and manganese. The gates consisted of several photoconducting elements and one electroluminescent element suitably connected and supplied with a sinusoidal voltage. In such circuits the functions of product, sum and negation for input light signals illuminating the photoconducting elements were realized, and the output signal was the light emitted by the electroluminescent element.

All-optical simultaneous AND & XOR logic gates based on nonlinear micro-ring resonator

“…It is possible to utilize optoelectronic method to design logic gates. The most important problem in optoelectronic devices is the need of conversion between optical and electrical signals (13). Moreover, the structures that have been suggested based on nonlinear effects of semiconductor optical amplifiers (SOAs) suffer from some limitations, such as latency time, power consumption, speed and size (14,15).…”

Multifunction optoelectronic gate

“…Nowadays, the optical fiber sensors are the most promising available sensing technologies, due to its advantages over the traditional electronic devices, such as immunity to electromagnetic interferences, electrical isolation, reduced weight and volume, and durability and resistance to harsh environments [2]. Among the several optical fiber sensing technologies, the ones often used for high temperatures sensing are based on regenerated fiber Bragg grating (FBG) [3,4] and Fabry-Perot interferometric (FPI) microcavities [5,6]. Uniform FBG based sensors are commonly used at low temperature values, and, its use for high temperature sensing is impracticable, as the grating erases itself at temperatures above 550 C [7].…”

“…Nevertheless, its production is a costly and time consuming process. More recently, a new emphasis was given to FPI based sensors, which require high cost production investments in complex fabrication and implementation setups [5,6].…”

“…Previous attempts on building all‐optical logic gates make use of nonlinear loop mirrors , nonlinearities in semiconductor optical amplifiers , or chaotic two‐section lasers . Another optoelectronic approach is based on an optoelectronic bistable switch consisting of a phototransistor and a LED , or photoconducting and electroluminescent thin films . However, all of these applications are wavelength dependent and cannot process multiple signals at different wavelengths at the same time.…”