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PERFORMANCE EVALUATION OF HIGH DATA RATE OPTICAL COMMUNICATION SYSTEM UTILIZING FBG COMPENSATED DISPERSION SCHEMES UNDER DIFFERENT MODULATION TECHNIQUES
تقييم اداء نضام اتصالات بصري عالي سرعة البيانات متضمنا محزز ب ا رغ الليفي محسن التشتت وبتقنيات تضمين مختلفة

Authors: Hussein Ahmed Mahmood --- Riyadh Khlf Ahmed
Journal: DIYALA JOURNAL OF ENGINEERING SCIENCES مجلة ديالى للعلوم الهندسية ISSN: 19998716/26166909 Year: 2017 Volume: 10 Issue: 2 Pages: 94-106
Publisher: Diyala University جامعة ديالى

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Abstract

In this paper, comparative study of three dispersion compensation fiber models, namely, pre, post and symmetrical involving ideal dispersion compensation fiber Bragg grating for three different modulation schemes in 40 Gb/s single channel optical fiber transmission system are performance evaluated. Three modulation schemes, different namely, duo-binary coding, modified duo-binary and carrier suppressed return to zero are simulated and analyzed in terms of Q-factor and bit error rate for each set up by range of CW laser power. The simulation of optical system based on optisystem-10.The result report that the symmetrical with ideal FBG at duo-binary coding depicts good performance for increasing the input power from-5 dBm to 10 dBm. It is clear that best Q value obtained is 28.24 dB for BER of 5.9 ×10-176 at input power of 5 dBm using symmetrical compensation cascaded with ideal FBG for duo-binary modulation scheme.

في هذا البحث تم تقييم اداء ومقارنة ثلاث نماذج لتحسين التشتت الليفي قبل ومشاركة متماثلة متضمنة المحززمثالي نوع ب ا رغ ولثلاث انواع مختلفة من نماذج التضمين وبمعدل ترميز مقداره 04 گيكا بت/ ثانية في قناة احادية الليفالضوئي. ان نماذج التضمين ثنائي الثنائي و ثنائي الثنائي المحور والرجوع للصفر خامد الم وجة الحاملة قد قيمت - -وحللت لمعيار عامل الجودة ونسبة الخطا في معدل نقل البيانات ولكل نموذج وذلك بتغيير قدرة الليزر المستم ا رلمدى. انالمحاكاة لل ا ربط الضوئي قد تمت باستخدام البرنامج (optisystem 10) . ان تقارير النتائج تثبت ان تحسين المشتت اللفينوع المتماثل في التضمين ثنائي الثنائي هو الافضل عند زيادة القدرة من 5 ملي ديسبل الى 04 ملي ديسبل. - - منالواضح ان افضل قيمة للعامل Q كانت 28.24 لقيم نسبة خطئ مقدارها 176-105.9× ولقدرة ادخال 5 ملي ديسبلوللتضمين نوع ثنائي الثنائي. -


Article
DCF with FBG for Dispersion Compensation in Optical Fiber Link at Various Bit Rates using Duobinary Modulation Format

Author: Hussein A. Mahmood
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 5 Part (A) Engineering Pages: 514-519
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Dispersion is one of the very important parameters that effect on the performance of optical fiber communication systems. It causes pulse broadening, limiting of transmission distance and the number of channels on optical fiber link and low Bit rate. Dispersion compensation fiber (DCF) based on Fiber Bragg Grating (FBG) is widespread used in the dispersion compensation scheme. In this work, the proposed dispersion compensation fiber is included (pre – post–symmetrical) schemes with Fiber Bragg Grating and duo-binary modulation format. These are at various bit rates (10 Gbit/s, 20 Gbit/s, 30 Gbit/s and 40 Gbit/s) and different input laser power from (0 dBm to 10 dBm) for 200 Km distance. Optisystem software version 10 is used to design simulation model. Q- factor and BER are two parameters which used to evaluate the performance analysis of the system, we concluded that, the symmetrical compensation techniques is better than others compensation schemes when the Q factor is 52.977 and bit rate is equal 0, these at 10 Gbit/s and 10 dBm transmitted power.

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