Abstract
In this paper, we propose and experimentally demonstrate the first single-$\lambda$ 40 Gb/s and 108 Gb/s multiple-input multiple-output orthogonal frequency-division
multiple access (OFDMA) passive optical networks (PON) architecture for next-generation PON
systems based on OFDM, polarization multiplexing (POLMUX), and direct detection. Superior
performance was exhibited after 20 km SSMF transmission and a 1:32 optical split. The novel
POLMUX approach greatly simplified receiver-end hardware compared to coherent detectors, while
increasing spectral efficiency to enable $40^{+}$ Gb/s data rates. Moreover, the proposed solution achieved the highest
single-wavelength downstream transmission reported to date in any PON system. As such, the
introduced architecture may be viewed as a highly attractive candidate for next-generation
optical access.
© 2010 IEEE
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