Research Output per year
In this paper, we demonstrate a novel fiber nonlinearity compensation technique for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) systems based on the transmission of phase-conjugated pilots (PCPs). In this scheme, a portion of OFDM subcarriers (up to 50%) is transmitted with its phase conjugates, which is used at the receiver to estimate the nonlinear distortions in the respective subcarriers and other subcarriers, which are not accompanied by PCPs. Simulation and experimental results show that by varying the PCP overhead, a performance improvement up to 4 dB can be achieved. In addition, the proposed technique can be effectively applied in both single polarization and polarization-division multiplexed systems, in both single channel and wavelength-division multiplexing systems, thus, offering highest flexibility in implementations.
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Funding: Sterlite Technologies and Finisar; European Commission (258033 (MODE-GAP), 318415 (FOX-C)); EPSRC (EP/J017582/1, EP/L000091/1).
- coherent detection
- coherent optical transmission
- Nonlinearity mitigation
- orthogonal frequency division multiplexing
Reduced waiting times using a fast switching dual-polarization DDQPSK receiver in a packet switched networkWalsh, A. J., Mountjoy, J., Fagan, A., Browning, C., Ellis, A. D. & Barry, L. P., 2014, European Conference on Optical Communication, ECOC. IEEE, 3 p. P.4.2
Research output: Chapter in Book/Report/Conference proceeding › Conference publication