Overview

• Direct current modulation of laser diodes; laser rate equations and their solution; limitations to direct current modulation; external modulation. • Mechanisms for optical switching and routing; candidate structures • Light propagation in optical fibres; fibre losses and dispersion; transmission windows • High impedance and trans-impedance receivers; optical amplifiers and repeaters • Modulation Formats. Modulator Technologies. Coherent Optical Communications Systems. System Design

Assessment Strategy

-threshold -Equivalent to 40%. Uses key areas of theory or knowledge to meet the Learning Outcomes of the module. Is able to formulate an appropriate solution to accurately solve tasks and questions. Can identify individual aspects, but lacks an awareness of links between them and the wider contexts. Outputs can be understood, but lack structure and/or coherence.

-good -Equivalent to the range 60%-69%. Is able to analyse a task or problem to decide which aspects of theory and knowledge to apply. Solutions are of a workable quality, demonstrating understanding of underlying principles. Major themes can be linked appropriately but may not be able to extend this to individual aspects. Outputs are readily understood, with an appropriate structure but may lack sophistication.

-excellent -Equivalent to the range 70%+. Assemble critically evaluated, relevant areas of knowledge and theory to construct professional-level solutions to tasks and questions presented. Is able to cross-link themes and aspects to draw considered conclusions. Presents outputs in a cohesive, accurate, and efficient manner.

Learning Outcomes

• Understand Digital Optical Communication Systems.

• Understand the direct and indirect modulation of semiconductor lasers.

• Understand the operation of optical switches and routers.

• Understand the principles and design of optical fibre waveguides and receivers.