Energy-efficient 0.26-Tb/s coherent-optical OFDM transmission using photonic-integrated all-optical discrete Fourier transform

• Published in: Optics express Vol. 20; no. 2; pp. 896 - 904
• Main Authors: Kang, I, Liu, X, Chandrasekhar, S, Rasras, M, Jung, H, Cappuzzo, M, Gomez, L T, Chen, Y F, Buhl, L, Cabot, S, Jaques, J
• Format: Journal Article
• Language: English
• Published: United States 16-01-2012
• Subjects: Electronics - instrumentation; Electronics - methods; Equipment Design; Fiber Optic Technology - instrumentation; Fiber Optic Technology - methods; Fourier Analysis; Models, Theoretical
• ISSN: 1094-4087; 1094-4087
• DOI: 10.1364/OE.20.000896

We propose a novel energy-efficient coherent-optical OFDM transmission scheme based on hybrid optical-electronic signal processing. We demonstrate transmission of a 0.26-Tb/s OFDM superchannel, consisting of 13 x 20-Gb/s polarization-multiplexed QPSK subcarrier channels, over 400-km standard single-mode fiber (SSMF) with BER less than 6.3x10(-4) using all-optical Fourier transform processing and electronic 7-tap blind digital equalization per subchannel. We further explore long-haul transmission over up to 960 km SSMF and show that the electronic signal processing is capable of compensating chromatic dispersion up to 16,000 ps/nm using only 15 taps per subchannel, even in the presence of strong inter-carrier interference.