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Tiago M. F. Alves, Luís, R. S., Puttnam, B. J., Cartaxo, A. V. T., Awaji, Y. & Wada, N. (2017). Performance of adaptive DD-OFDM multicore fiber links and its relation with intercore crosstalk. Optics Express. 25 (14), 16017-16027

T. M. Alves et al.,  "Performance of adaptive DD-OFDM multicore fiber links and its relation with intercore crosstalk", in Optics Express, vol. 25, no. 14, pp. 16017-16027, 2017

@article{alves2017_1714682552665,
	author = "Tiago M. F. Alves and Luís, R. S. and Puttnam, B. J. and Cartaxo, A. V. T. and Awaji, Y. and Wada, N.",
	title = "Performance of adaptive DD-OFDM multicore fiber links and its relation with intercore crosstalk",
	journal = "Optics Express",
	year = "2017",
	volume = "25",
	number = "14",
	doi = "10.1364/OE.25.016017",
	pages = "16017-16027",
	url = "https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-14-16017"
}

TY  - JOUR
TI  - Performance of adaptive DD-OFDM multicore fiber links and its relation with intercore crosstalk
T2  - Optics Express
VL  - 25
IS  - 14
AU  - Tiago M. F. Alves
AU  - Luís, R. S.
AU  - Puttnam, B. J.
AU  - Cartaxo, A. V. T.
AU  - Awaji, Y.
AU  - Wada, N.
PY  - 2017
SP  - 16017-16027
SN  - 1094-4087
DO  - 10.1364/OE.25.016017
UR  - https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-14-16017
AB  - Adaptive direct-detection (DD) orthogonal frequency-division multiplexing (OFDM) is proposed to guarantee signal quality over time in weakly-coupled homogenous multicore fiber (MCFs) links impaired by stochastic intercore crosstalk (ICXT). For the first time, the received electrical power of the ICXT and the performance of the adaptive DD-OFDM MCF link are experimentally monitored quasi-simultaneously over a 210 hour period. Experimental results show that the time evolution of the error vector magnitude due to the ICXT can be suitably estimated from the normalized power of the detected crosstalk. The detected crosstalk results from the beating between the carrier in the test core and ICXT originating from the carrier and modulated signal from interfering core. The results show that the operation of DD-OFDM systems employing fixed modulation can be severely impaired by the presence of ICXT that may unpredictable vary in both power and frequency. The system may suffer from deleterious impact of moderate ICXT levels over a time duration of several hours or from peak ICXT levels occurring over a number of minutes. Such power fluctuations can lead to large variations in bit error ratio (BER) for static modulation schemes. Here, we show that BER fluctuations may be minimized by the use of adaptive modulation techniques and that in particular, the adaptive OFDM is a viable solution to guarantee link quality in MCF-based systems. An experimental model of an adaptive DD-OFDM MCF link shows an average throughput of 12 Gb/s that represents a reduction of only 9% compared to the maximum throughput measured without ICXT and an improvement of 23% relative to throughput obtained with static modulation.
ER  -