ALL OPTICAL FREQUENCY ENCODED COMBINATIONAL LOGIC DEVICES UTILIZING POLARIZATION INDEPENDENT FOUR-WAVE MIXING IN SEMICONDUCTOR OPTICAL AMPLIFIERS

摘要

Semiconductor optical amplifier (SOA) is among one of the most promising candidate for all optical computation and communication technology implementation. An all optical multiplexer and demultiplexer utilizing SOA-based dual pump four-wave mixing is proposed and explained. A multiplexer and demultiplexer are very important device for both optical computation and communication system and find variety of applications. In this communication, a multiplexer and a demultiplexer are proposed using frequency encoded format. Two very simple but interesting applications of demultiplexer one as decoder of two-bit frequency encoded numbers and another as comparator of frequency encoded single-bit numbers are presented for the first time in this communication. The devices proposed here can show ultra fast speed of operation and compact with advantages of using frequency-encoding technique for representing states of information.