Design and Implementation of All Optical Processing Units Together Performing Arithmetic and Logical Functions

Abstract

AbstractTwo different optical processing units have been designed in the proposed manuscript. They are integrated together to get different arithmetic and logical functions like half adder, NOT, NOR, XOR and AND gates. The designed photonic circuit is based on photonic interactions in the active region of semiconductor optical amplifier (SOA) which forms the heart of the design. This manuscript also discusses in detail two important non-linear attributes of semiconductor optical amplifier (SOA) which are cross gain modulation, (XGM) and cross phase modulation, (XPM). Both are utilized to obtain the desired functions. Input signals to the designed photonic circuit are non-return to zero (NRZ) pulses with varied envelope types such as on–off, on–off exponential, on–off ramp and raised cosine. The performance of the designed circuit is analyzed with parameters like extinction ratio (ER) and quality factor (QF). The reported results show that the quality factor remains unaffected at 63.01 dB for various pulse type but extinction ratio is highest for on–off ramp type which is 15.45 dB. KeywordsOptical processing unit (OPU)Semiconductor optical amplifier (SOA)Optical gatesNon-linearityExtinction ratio (ER)Quality factor (QF)