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In perturbation based nonlinearity compensation (PB-NLC) quantization of perturbation coefficients is employed for reduction of computational and implementation complexity. In this work, we propose and experimentally verified adoption of decision directed least mean square (DD-LMS) algorithm for optimization and complexity reduction of PB-NLC. We show that for 32 GBaud dual polarization (DP) 16 QAM...
Sub-band-multiplexed data architecture has been proposed for mitigation of fiber chromatic dispersion (CD). This technique requires pulse-shaping filters with very small roll-off factor to limit the linear cross-talk between overlapped neighboring sub-bands. In this work, we propose and numerically investigate adoption of low complexity non-iterative inter-band interference (IBI) compensation technique...
We propose and experimentally demonstrate a receiver structure for direct detection optical orthogonal frequency-multiplexing systems that improves the spectral efficiency by reducing the guard band between the carrier and the OFDM signal while mitigating signal-signal mixing interference.
Optical back propagation techniques that utilize two highly nonlinear fibers to compensate for transmission fiber nonlinear effects are analyzed. When the step-size is equal to the amplifier spacing, inline compensation of fiber nonlinearity without inline dispersion compensation provides the best performance.
A second-order perturbation technique is used to develop analytical expressions for the phase variance in a nonlinear fiber optic system based on phase-shift keying. Typically, in short-haul fiber optic communication system, the nonlinear effects are smaller than dispersive effect, and it is found that the difference between the first and second-order solution is negligible. However, when the transmission...
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