OPTICAL COMMUNICATION (CCE)

SHE Level 3
SCQF Credit Points 20.00
ECTS Credit Points 10.00
Module Code M3H624693
Module Leader Martin MacDonald
School School of Computing, Engineering and Built Environment
Subject SCEBE - School Office
Trimesters
  • A (September start)
  • B (January start)

Summary of Content

This Course introduces the students to optical realization of energy through the various optical fiber modes, configurations and various signal degradation factors associated with marvels of the optical fibers. A detailed study is done about various optical sources and optical detectors and their use in the optical communication system. Students are exposed to critically evaluate the performance issues of modern digital optical transmission systems.

Syllabus

The teaching syllabus will cover the following areas: General Principles Element of an Optical Fiber Transmission link- Optical Fiber Modes and Configurations -Mode theory of Circular Wave guides- Maxwell's Equations for optical guides - Overview of Modes - Mode theory for circular waveguides- Linearly Polarized Modes -Single Mode Fibers - Graded Index fiber structure. Fiber materials - Fiber Fabrication-Structure of Fiber Optic Cables. -720 Signal Degradation in Optical Fibers Attenuation and Absorption losses - Urbach's rule, Scattering losses - Rayleigh scattering, Bending Losses, Core and Cladding losses, Signal Distortion in Optical Wave guides-Information Capacity determination -Group Delay - Material Dispersion, Wave guide Dispersion, Signal distortion in Single Mode fibers-Polarization Mode dispersion, Inter-modal dispersion, Pulse Broadening in GI fibers-Mode Coupling -Design Optimization of Single Mode fibers-Refractive Index profiles and cut-off wavelength. Fiber Optic Sources and Coupling Direct and indirect band gap materials - LED structures - Light source materials -Quantum efficiency and LED power, Modulation of a LED, Laser Diodes-modes and threshold conditions-Structures and Radiation Patterns-Single Mode Lasers-Modulation of Laser Diodes- Temperature effects,- Source to Fiber power launching and coupling, Fiber-to-Fiber joints, Fiber splicing. Fiber Optic Receivers PIN Photo detectors, Avalanche Photo Diodes-Photo detector noise, SNR, Detector Response time, Avalanche Multiplication Noise, Temperature effects-Fundamental Receiver Operation --digital signal transmission - preamplifiers - Probability of Error - Quantum Limit. Analog Systems Overview of analog links, carrier to noise ratio- carrier power, relative intensity noise and its reflection effects and limiting conditions, Subcarrier multiplexing. Digital Transmission System Point-to-Point links System considerations -Link Power budget -Rise-time budget-Line Coding-Eye Pattern-Noise Effects on System Performance-Computer aided Modeling-Operational Principles of WDM, Hardcore Optical Fiber LANs-Optical Amplifiers-Optical Switching elements-Basic on concepts of SONET/SDH Network

Learning Outcomes

On completion of this module the student should be able to1. Describe the optical fiber communication link, fiber modes, configurations and structures (AM1, AM8).2. Illustrate the different kind of losses, distortion in optical wave guides (AM1, AM8).3. Differentiate the various optical sources and detectors and their characteristics and applications (AM1, AM5, AM8).4. Distinguish the optical networks, multiplexing and modulation schemes that can be used in the optical fiber communication system (AM1, AM5, AM8). 5. Evaluate the overall system performance by means of link budget analysis (AM1, AM5, AM8)

Teaching / Learning Strategy

Example subsystems/systems, reading assignments, case studies and computer aided learning materials will be used in addition to lectures and tutorials.Tutorials will be used to reinforce the module material discussed during lecture sessions.Tutorials also serve as a platform of technical discussions to clarify any queries that arise from directed studies.

Indicative Reading

Essential -360 1. Keiser,G.,2007.Optical Fiber Communication.4 th ed. Singapore: McGraw-Hill International Editions. Indicative -360 1. Senior, J., 2000. Optical Communication, Principles and Practice. 2 nd ed. New Delhi: Prentice -Hall of India Gowar, J., 2001. Optical Communication System.2 nd ed. New Delhi: Prentice-Hall of India

Transferrable Skills

Tutorials provide : Problem Solving and Numeracy Reports provide: Communication/Literacy/Linguistic/Critical Evaluation

Module Structure

Activity Total Hours
Lectures (FT) 56.00
Assessment (FT) 16.00
Independent Learning (FT) 100.00
Tutorials (FT) 28.00

Assessment Methods

Component Duration Weighting Threshold Description
Exam (Exams Office) 3.00 50.00 45% Final Examination - unseen exam 3 hour duration
Exam (School) 1.50 20.00 35% Mid-term test - unseen test 90 minutes duration
Coursework 1 n/a 30.00 35% Case study: written report- 1500 words