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A PAPR Reduction Technique based on a Constant Envelope OFDM Approach for Fiber Nonlinearity Mitigation in Optical Direct Detection Systems

Silva, J. A. L. Silva ; Cartaxo, A. ; Segatto, M.

IEEE/OSA Journal of Optical Communications and Networking Vol. 4, Nº 4, pp. 1 - 7, April, 2012.

ISSN (print): 1943-0620
ISSN (online): 1943-0620

Journal Impact Factor: 1,128 (in 2010)

Digital Object Identifier: 10.1364/JOCN.4.000296

In this paper, we propose a new peak-to-average
power ratio reduction technique based on a constant envelope
orthogonal frequency division multiplexing (CE-OFDM)
approach to mitigate fiber induced nonlinearities in directdetection
optical OFDM (DDO-OFDM) systems. Simulation
results show that the proposed 10 Gbps DDO-CE-OFDM
system using 16-quadrature amplitude modulation (16-QAM),
2:66 GHz signal bandwidth and different values of electrical
phase modulation index outperforms DDO-OFDM systems
as it increases fiber nonlinearity tolerance in fiber links
without optical dispersion compensation. The bit error rate
of the proposed transmission scheme is decreased by a factor
of 1000 if compared to conventional DDO-OFDM systems, for
10 dBm of optical input power and considering a span of 960
km of standard single-mode fiber.