Energy-efficient 0.26-Tb/s coherent-optical OFDM transmission using photonic-integrated all-optical discrete Fourier transform
16 January 2012
We propose energy-efficient coherent-optical OFDM transmission using hybrid optical-electronic signal processing. We demonstrate 0.26-Tb/s (13 polarization-multiplexed 10-Gb/s QPSK signals) OFDM transmission over 400-km standard single-mode fiber with BER less than 6.3x10-4 using all-optical Fourier transform processing and electronic 7-tap blind digital equalization per subcarrier. We further explore long-haul transmission over up to 960 km and show that the signal processing is flexible where the number of taps can be easily adjusted from 3 to 15 for compensating inter-carrier interference and chromatic dispersion from 0 to 16,000 ps/nm.