Comparative Analysis of DCF based Dispersion Compensation Techniques in Optical Fiber Communication Link using Different Input Transmitter Conditions at 10 Gbps

Gaurav Sharma Et.Al

doi:10.17762/turcomat.v12i3.1567

Abstract

In this paper, Dispersion Compensating Fiber (DCF) based various dispersion compensating techniques (pre, post and symmetrical) with different modulation format like Non Return to Zero(NRZ), Return to Zero(RZ), Carrier Suppressed Return to Zero(CSRZ) and Duo Binary(DB) along with PN, FCC and Walsh code input sequences are implemented. Simulation and analysis of these implemented techniques were done at 10 Gbps bit rate and input laser power ranging from 1 mW to 10 mW at transmission distance of 240 km using BER Analyzer in Optisystem 17.0 software. Comparison between different techniques was done in terms of Q factor and BER versus input CW laser power for different modulations and input sequences. From the analysis, it is concluded that when Walsh code as user defined input sequence are used for all the implementation, it gives higher value of Q factor and lower value of Bit Error Rate as compared to PN and FCC codes for most of the input CW laser power.

Highlights

Optical Fiber Communication is one of the most important topics of research in today’s world communication systems
All the simulated designs have been analyzed at 10 Gbps in terms of Q factor and Bit Error Rate (BER) using BER analyzer in Optisystem 17.0 software and comparison between them was done on the basis of input sequences like PN, FCC and Walsh code, modulation formats (NRZ, Return to zero (RZ), Carrier Suppressed Return to Zero (CSRZ) and Duo Binary) with CW laser power level from 1mW to 10 mW
It provides the high value of Q factor = 53.9792 for Pre Dispersion Compensating Fiber (DCF), Q factor=55.3907 for Post DCF and Q factor=52.4185 for Symmetrical DCF technique using Walsh code at 10 mW CW laser power

Summary

Introduction

Optical Fiber Communication is one of the most important topics of research in today’s world communication systems. The whole comparative analysis is based on the type of DCF based dispersion compensation techniques, types of modulation techniques and types of input sequence code used for the simulation. In this technique a fiber having large negative dispersion coefficient is used along with a Single Mode Fiber (SMF) having positive. The length of the SMF was taken to be 100 km and dispersion coefficient of fiber was taken to be 17 ps/nm-km whereas length of DCF was Comparative Analysis of DCF based Dispersion Compensation Techniques in Optical Fiber Communication Link using Different Input Transmitter Conditions at 10 Gbps taken to be 20 km and dispersion coefficient was taken to be -85 ps/nm-km. Due to this orthogonality property, and when system is perfectly synchronized, the cross-correlation between any two WH codes of the same matrix (set) is zero

Simulation Setup

Simulation Results

CONCLUSION AND FUTURE SCOPE