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.