Digital Academy

Digital Communication Networks

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Learning outcomes: -

how 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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Contributed by: Digital Academy
Authored by: Tina Johnson, NHS England, Programme Coordinator
Licence: More information on licences
Last updated: 22 August 2024
First contributed: 01 July 2022
Audience access level: Full user

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