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Impact of PMD in Single-Receiver and Polarization-Diverse Direct-Detection Optical OFDM

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3 Author(s)
Schmidt, B. ; Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Melbourne, VIC, Australia ; Lowery, A.J. ; Armstrong, J.

Polarization-mode dispersion (PMD) can cause frequency-selective fading in direct-detection optical orthogonal frequency division multiplexing (DDO-OFDM) systems. In this paper, we examine the effects of this fading. We begin with an analysis of the frequency-selective fading caused by first-order PMD. We then estimate the impact of PMD in single-receiver DDO-OFDM using all-order simulations to generate outage probabilities as a function of signal-to-noise ratio (SNR) penalty. The performances of three single-receiver DDO-OFDM formats are compared and a new format that minimizes the frequency difference between the carrier and sideband is found to be more tolerant to PMD. We then introduce a DDO-OFM system that includes polarization diversity and carrier boost in the receiver. The effects of various configurations are simulated and the results suggest that a data rate of 42.7 Gb/s can be achieved within an optical bandwidth of 40 GHz, and with negligible PMD penalties.

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Lightwave Technology, Journal of  (Volume:27 ,  Issue: 14 )