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Spectrally Efficient WDM Nyquist Pulse-Shaped 16-QAM Subcarrier Modulation Transmission With Direct Detection

Erkilinc, MS; Li, Z; Pachnicke, S; Griesser, H; Thomsen, BC; Bayvel, P; Killey, RI; (2015) Spectrally Efficient WDM Nyquist Pulse-Shaped 16-QAM Subcarrier Modulation Transmission With Direct Detection. Journal of Lightwave Technology , 33 (15) pp. 3147-3155. 10.1109/JLT.2015.2427111. Green open access

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Abstract

The ability to transmit signals with high information spectral density (ISD) using low-complexity and cost-effective transceivers is essential for short- and medium-haul optical communication systems. Consequently, spectrally efficient direct detection transceiver-based solutions are attractive for such applications. In this paper, we experimentally demonstrate the wavelength-division multiplexed (WDM) transmission of 7×12 GHz-spaced dispersion pre-compensated Nyquist pulse-shaped 16-QAM subcarrier modulated channels operating at a net bit rate of 24 Gb/s per channel, and achieving a net optical ISD of 2.0 b/s/Hz. The direct detection receiver used in our experiment consisted of a single-ended photodiode and a single analog-to-digital converter. The carrier-to-signal power ratio at different values of optical signal-to-noise ratio was optimized to maximize the receiver sensitivity performance. The transmission experiments were carried out using a recirculating fiber loop with uncompensated standard single-mode fiber and EDFA-only amplification. The maximum achieved transmission distances for single channel and WDM signals were 727 and 323 km below the bit-error ratio of 3.8 × 10-3, respectively. To the best of our knowledge, this is the highest achieved ISD for WDM transmission in direct detection links over such distances.

Type: Article
Title: Spectrally Efficient WDM Nyquist Pulse-Shaped 16-QAM Subcarrier Modulation Transmission With Direct Detection
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2015.2427111
Publisher version: http://dx.doi.org/10.1109/JLT.2015.2427111
Language: English
Additional information: © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Keywords: Science & Technology, Technology, Physical Sciences, Engineering, Electrical & Electronic, Optics, Telecommunications, Engineering, Digital signal processing, direct detection, information spectral density, Nyquist pulse shaping, optical fiber communication, single sideband signaling, subcarrier modulation, transceiver design, wavelength division multiplexing, OPTICAL OFDM TRANSMISSION, SUPERCHANNEL TRANSMISSION, BINARY TRANSMISSION, SYSTEMS, PERFORMANCE, SIGNALS, COMMUNICATION, CANCELLATION, DUOBINARY, CAPACITY
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/1488546
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