Li, Z;
Erkilinc, MSE;
Shi, KS;
Sillekens, ES;
Galdino, LG;
Xu, TX;
Thomsen, BT;
... Killey, RK; + view all
(2018)
Digital Linearization of Direct-Detection Transceivers for Spectrally Efficient 100 Gb/s/λ WDM Metro Networking.
Journal of Lightwave Technology
, 36
(1)
pp. 27-36.
10.1109/JLT.2017.2777858.
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Abstract
Single-polarization, single-photodiode based direct-detection (DD) transceivers offer advantages for metro networks due to their simple and low-cost optical hardware structure. Single-sideband Nyquist-pulse-shaped subcarrier modulation (SSB Nyquist-SCM) is a promising signal format to achieve high information spectral density (ISD) in such DD systems. In this paper, we present theoretical and experimental evaluations of a variety of direct-detection SSB Nyquist-SCM system designs, operating at 100 Gb/s per wavelength in WDM metro network scenarios. Through simulations, several receiver-based digital linearization techniques to overcome the effect of signal-signal beat interference were investigated, and their performance compared with alternative approaches, including optical beat-interference cancellation receivers (BICRx) and coherent receivers (both heterodyne and homodyne). Subsequently, experimental assessments of the digitally-linearized DD receivers were carried out. Spectrally-efficient (net ISD exceeding 3 (b/s)/Hz) 4 × 112 Gb/s WDM DD single-sideband 16-QAM Nyquist-SCM transmission over distances of up to 240 km (multi-span links) and 160 km (single-span links without inline amplification) were shown to be possible using uncompensated standard single mode fiber.
| Type: | Article |
|---|---|
| Title: | Digital Linearization of Direct-Detection Transceivers for Spectrally Efficient 100 Gb/s/λ WDM Metro Networking |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JLT.2017.2777858 |
| Publisher version: | https://doi.org/10.1109/JLT.2017.2777858 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/ |
| Keywords: | Optical filters, Optical receivers, Amplitude modulation, Transceivers, Wavelength division multiplexing, Optical polarization |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10039377 |
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