Design of Various All-Optical Code Converters using SOA-MZI

Abstract

This paper proposes various all-optical code converters using co-propagating Semiconductor Optical Amplifier assisted Mach-Zehnder Interferometer (SOA-MZI) configuration. All-optical binary, gray, Binary Coded Decimal (BCD) and octal code converters are designed at 10Gbps all-optical XOR and OR gates. All-optical logic functions are achieved from the non-linear properties of SOA. SOA in an interferometer arrangement converts the phase modulation to intensity modulation. It works with the basic principle of phase change and the phase change is achieved with the help of 3-dB couplers. Comparing with the other types of non-linearity of SOA, Cross-Phase Modulation (XPM) technique ensures polarization insensitivity of the incoming signal. The analysis for the designed code converters are done with Extinction Ratio (ER), Bit Error Rate (BER) and Q-factor using optisystem.