Abstract

We carry out comprehensive analysis on the fiber nonlinearity impact on the block-wise phase switching (BPS) direct detection (DD) systems. We find that the degenerate four-wave mixing components produced by the interaction between the main carrier and the subcarriers are intrinsically compensated through the direct detection process. For a 100-Gb/s BPS–DD system over 80-km standard single-mode-fiber link, the optimum launch power is found to be 5 dBm, and the optimum carrier-to-signal power ratio is 12 dB. For a single-channel BPS–DD system, the fiber nonlinearity impairment is reduced when low-dispersion fiber is used. However, for a multi-channel BPS–DD system, the nonlinearity noise induced by the crosstalk among the channels is enhanced when the chromatic dispersion of the fiber link decreases.

© 2014 IEEE

Block-wise phase switching for double-sideband direct detected optical OFDM signals

Xi Chen, An Li, Di Che, Qian Hu, Yifei Wang, Jiayuan He, and William Shieh
Opt. Express 21(11) 13436-13441 (2013)

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

Jair A. L. Silva, Adolfo V. T. Cartaxo, and Marcelo E. V. Segatto
J. Opt. Commun. Netw. 4(4) 296-303 (2012)

61 Gbits/s direct-detection optical OFDM based on blockwise signal phase switching with signal-to-signal beat noise cancellation

An Li, Di Che, Xi Chen, Qian Hu, Yifei Wang, and William Shieh
Opt. Lett. 38(14) 2614-2616 (2013)

Performance Assessment of XPM-Limited Direct-Detection Short-Reach DSB OFDM Optical Systems

Tiago M. F. Alves and Adolfo V. T. Cartaxo
J. Opt. Commun. Netw. 7(8) 736-747 (2015)

Performance of 16 QAM-OFDM With New Null Subcarrier Shifting in an Intensity-Modulated Direct Detection System

Hongxian Chen, Jing He, Jin Tang, Fan Li, Ming Chen, and Lin Chen
J. Opt. Commun. Netw. 6(2) 159-164 (2014)