This work is an investigation of leaky ray (mode) attenuation in graded multimode fibres.
In contrast to slab or rectangular dielectric waveguides,
cylindrical fibres possess leaky modes which greatly modify
their propagation properties. The power carried by such modes
eventually diminishes to zero, thus adding no useful contribution
to the signal transmission over fibre channels. Suitable filtering
techniques are therefore proposed. [Continues.]
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.