60Gbit/s 64 QAM-OFDM coherent optical transmission with a 5.3GHz bandwidth

Abstract

Abstract:We present a 60 Gbit/s polarization-multiplexed coherent optical OFDM transmission at 5 Gsymbol/s by employing 64 QAM subcarrier modulation. We adopted a frequency-stabilized fiber laser and an optical PLL to achieve this high multiplicity in the subcarrier modulation. As a result, we successfully transmitted 60 Gbit/s data over 160 km with a demodulation bandwidth of only 5.3 GHz. Keywords: coherent transmission, orthogonal frequency division multiplexing, quadrature amplitude modulation, spectral efficiency, frequency-stabilized laser, optical phase-locked loop Classification: Fiber-optic communication References[1] M. Nakazawa, M. Yoshida, K. Kasai, and J. Hongou, "20 Msymbol/s, 64 and 128 QAM coherent optical transmission over 525 km using heterodyne detection with frequency-stabilised laser,"