Skip to main content

Unit information: Optoelectronic Devices and Systems 3 in 2021/22

Unit name Optoelectronic Devices and Systems 3
Unit code EENG30004
Credit points 10
Level of study H/6
Teaching block(s) Teaching Block 1 (weeks 1 - 12)
Unit director Professor. Cryan
Open unit status Not open
Pre-requisites

Successful completion of Year 2 BEng or MEng Electrical & Electronic Engineering or equivalent

Co-requisites

None

School/department Department of Electrical & Electronic Engineering
Faculty Faculty of Engineering

Description

This module introduces the main components of modern day optoelectronic systems. This will include active devices for the generation, detection, amplification and modulation of optical signals and the key passive components in modern optical communication systems.

Elements
Optoelectronic Devices

Passive Components
Waveguides: Introduction to passive waveguides and their modes. Explain the single mode optical fibre, losses and dispersion. Directional couplers, Bragg reflectors and filters.

Active Components
Sources: introduction to electron-photon interactions in semiconductors. Explain the operation of the light emitting diode (LED). Explain the conditions required for laser action and distinguish the characteristics of laser emission from LED emission. Describe the current/voltage, power/current and frequency characteristics of light-emitting and laser diodes. Describe the Fabry-Perot and distributed-feedback and distributed-Bragg-reflector laser diodes, and explain the factors that determine their line-widths.


Detectors: explain the principles of optical detectors including PIN photodiodes and avalanche detectors. Discuss the ideal, quantum-noise limited receiver obeying Poisson statistics and relate number of detected photons to bit-error-ratio. Explain why the sensitivity of the best receivers falls short of the ideal.


Amplifiers and modulators: Introduce the optical amplifiers and optical modulators. Give examples of fibre amplifiers and semiconductor laser amplifiers. Introduce electro-optic and electro-absorption modulators. Indicate their different applications in optical fibre communication systems.
Systems: explain how the elements introduced above fit into a modern day optical communications system

Intended learning outcomes

Having completed this unit, students will be able to:

  1. Explain single mode optical fibre, losses and dispersion, directional couplers, Bragg reflectors and filters.
  2. Explain the operation of the light emitting diode (LED).
  3. Explain the conditions required for laser action and distinguish the characteristics of laser emission from LED emission.
  4. Describe the current/voltage, power/current and frequency characteristics of light-emitting and laser diodes.
  5. Describe the Fabry-Perot and distributed-feedback and distributed-Bragg-reflector laser diodes, and explain the factors that determine their line-widths.
  6. Explain the principles of optical detectors including PIN photodiodes and avalanche detectors.
  7. Discuss the ideal, quantum-noise limited receiver obeying Poisson statistics and relate number of detected photons to bit-error-ratio.
  8. Explain why the sensitivity of the best receivers falls short of the ideal.
  9. Give examples of fibre amplifiers and semiconductor laser amplifiers.
  10. Indicate the different applications of electro-optic and electro-absorption modulators in optical fibre communication systems.
  11. Explain how the elements introduced above fit into a modern day optical communications system.

Teaching details

Teaching will be delivered through a combination of synchronous and asynchronous sessions, including lectures, practical activities supported by drop-in sessions, problem sheets and self-directed exercises.

Assessment Details

Formative: Online Test 1 & 2

Summative: Exam (January, 100%)

Resources

If this unit has a Resource List, you will normally find a link to it in the Blackboard area for the unit. Sometimes there will be a separate link for each weekly topic.

If you are unable to access a list through Blackboard, you can also find it via the Resource Lists homepage. Search for the list by the unit name or code (e.g. EENG30004).

Feedback