Digital communications
Digital communications

This free course is available to start right now. Review the full course description and key learning outcomes and create an account and enrol if you want a free statement of participation.

Free course

Digital communications

Learning outcomes

After studying this course, you should be able to:

  • convert between wavelengths and frequencies

  • describe the main differences between lasers and LEDs as used as light sources for optical-fibre communications systems

  • describe the difference between direct and external modulation of a laser

  • describe the difference in structure and performance of step-index multimode, graded-index multimode and single-mode optical fibres

  • draw up a power budget for an optical-fibre communication link and use it to estimate the maximum link distance.

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