In this paper, we propose an overall optimization of discrete multitone (DMT) transmissions over polymer optical fiber (POF). The optimization is carried out from both a theoretical and experimental approach. At first, the parameters of the POF channel characteristics, resonant cavity light emitting diode (RC-LED) dynamic nonlinearity performance and analog-to-digital converter effective number of bits (ENOB), in our digital storage oscilloscope are measured. From the measured results, we investigate the channel capacity of a 50 m step-index POF system. Then the optimal DMT bandwidth is theoretically derived. We also optimize the system with different experimental setups. The optimal cyclic prefix length and RC-LED optimal working current are given. The ENOB can be improved by oversampling and averaging. The optimal oversampling factor is discussed. Furthermore, a joint DMT clipping and subcarrier number optimization is synthetically investigated. Based on the proposed approaches, an optimized DMT gigabit transmission over a real 50 m POF channel employing low-cost components is presented. Finally, a methodology for the practical design of the DMT transmission over POF is concluded.
© 2013 Optical Society of AmericaFull Article | PDF Article
OSA Recommended Articles
Opt. Express 19(5) 4280-4293 (2011)
Christian R. Berger, Yannis Benlachtar, Robert I. Killey, and Peter A. Milder
Opt. Express 19(18) 17713-17728 (2011)
Beril Inan, S. C. Jeffrey Lee, Sebastian Randel, Ioannis Neokosmidis, Antonius M.J. Koonen, and Joachim W. Walewski
J. Opt. Commun. Netw. 1(5) 439-451 (2009)