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Appl. Sci. 2017, 7(10), 999; doi:10.3390/app7100999

Bit- and Power-Loading—A Comparative Study on Maximizing the Capacity of RSOA Based Colorless DMT Transmitters

1
Institute of Electromagnetic Fields (IEF), ETH Zurich, 8092 Zurich, Switzerland
2
Now with RANOVUS GmbH, Nordostpark 07, 90411 Nuremberg, Germany
3
Thales Research and Technology and CEA Leti, Route de Nozay, a Joint Lab of Alcatel-Lucent Bell Labs France, III-V Lab, 91460 Marcoussis, France
4
Now with Huawei Technologies Duesseldorf GmbH, Optical & Quantum Laboratory, Riesstrasse 25-C3, 80992 Munich, Germany
*
Author to whom correspondence should be addressed.
Received: 6 August 2017 / Accepted: 4 September 2017 / Published: 27 September 2017
(This article belongs to the Special Issue Applications of Semiconductor Optical Amplifiers)
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Abstract

We present a comparative study of the capacity increase brought by bit- and power-loading discrete multi-tone (DMT) modulation for low-cost colorless transmitters. Three interesting reflective semiconductor optical amplifier (RSOA) based colorless transmitter configurations are compared: First, an amplified spontaneous emission (ASE) spectrum-sliced source; second, a self-seeded RSOA fiber cavity laser (FCL) and third, an externally seeded RSOA. With bit- and power-loaded DMT, we report record high line rates of 6.25, 20.1 and 30.7 Gbit/s and line rates of 4.17, 10.1 and 24.5 Gbit/s in a back-to-back and in a 25 km nonzero dispersion shifted fiber (NZDSF) transmission experiments for the three transmitter configurations, respectively. In all the experiments, BER (bit error ratios) below an FEC (forward error correction) limit of 7.5 × 10−3 were achieved. View Full-Text
Keywords: bit- and power-loading; colorless transmitter; discrete multi-tone (DMT); reflective semiconductor optical amplifier (RSOA); WDM-PON bit- and power-loading; colorless transmitter; discrete multi-tone (DMT); reflective semiconductor optical amplifier (RSOA); WDM-PON
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Gebrewold, S.A.; Bonjour, R.; Brenot, R.; Hillerkuss, D.; Leuthold, J. Bit- and Power-Loading—A Comparative Study on Maximizing the Capacity of RSOA Based Colorless DMT Transmitters. Appl. Sci. 2017, 7, 999.

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