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In this thesis, we analyse the efficacy of the 3LCDM technique in ultra-fast optical fibre networking settings. In comparison to a typical 51 Gb/s non return to zero (NRZ- OOK) system, the dispersion tolerance of a 51 Gb/s 3LCDM system is much larger, as shown by the results. There is an 81 ps/nm chromatic dispersion tolerance at a BER of 10- • 51 Gb/s in the upper tier, and a 98 ps/nm chromatic dispersion tolerance in the bottom tier. Compared to the normal NRZ values for 40 Gb/s, which are about 48 ps/nm, these are much higher values.