Multi-level Linecoding for Ultra-high Speed Long-haul Optical Fibre Communications Systems
نویسندگان
چکیده
The demands for greater spectral efficiency, higher line rate, higher channel count, greater amplifier/repeater spacing, Tb/s capacity DWDM long haul optical communication systems, efficient transmission of optical channels over long-haul optical fibre system is essential. Since the conventional Return to zero (RZ) and Non return to zero (NRZ) modulation formats suffer from dispersion and inefficient for multiplexing several channels, multi-level signaling using novel modulation formats, such as novel optical coding and carrier suppressed – duobinary are studied in this paper for Tb/s capacity optical transmission systems. A comprehensive modeling platform is demonstrated and the modulation formats are described in detail. Performances of these modulation formats are analyzed against impairment factors such as fiber dispersion, fiber non linear effects, and optical power loss. We demonstrate that, novel optical coding can be used to transmit 65 x 40Gbps channels, while 81 x 40Gpbs DWDM channels can be transmitted using carrier suppressed duo binary modulation, along 100km dispersion compensated optical fibre link. The achieved spectrum efficiency for these techniques is 0.41bit/s/Hz and 0.8bit/s/Hz respectively. MECSE-25-2004: "Multi-level Linecoding for Ultra-high Speed Long-haul Optical ...", LN Binh and D. Perera
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