Channel Capacity of Non-Linear Transmission Systems

摘要: Since their introduction in the late 1970s, capacity of optical communication links has grown exponentially, fuelled by a series key innovations including movement between three telecommunication windows 850 nm, 1,310 nm and 1,550 distributed feedback laser, erbium-doped fibre amplifiers (EDFAs), dispersion-shifted dispersion-managed links, external modulation, wavelength division multiplexing, switching, forward error correction (FEC), Raman amplification, most recently, coherent detection, electronic signal processing orthogonal frequency multiplexing (OFDM). Throughout this evolution, one constant factor been use single-mode fibre, whose fundamental principles dated back to 1800s, when Irish scientist, John Tyndall demonstrated lecture Royal Society London that light could be guided through curved stream water [1]. Following many developments, proposal for waveguides J.J. Thompson [2], presentation detailed calculations dielectric Snitzer [3], [4] fabrication [5] ultra low loss fibres, fibres were first adopted non-experimental Dorset, UK 1975, are still today, despite evolving designs control chromatic dispersion non-linearity.