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Discrete Multitone Format for Repeater-Less Direct-Modulation Direct-Detection Over 150 km

Liu, Z; Kelly, B; OCarroll, J; Phelan, R; Richardson, DJ; Slavik, R; (2016) Discrete Multitone Format for Repeater-Less Direct-Modulation Direct-Detection Over 150 km. Journal of Lightwave Technology , 34 (13) pp. 3223-3229. 10.1109/JLT.2016.2555962. Green open access

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Abstract

High-capacity and low-cost repeater-less transmission beyond 50 km is of interest for the next-generation inter-data center communications. Transmission over such relatively long distance generally requires transmission in the 1550-nm low-loss telecom band that is, however, impaired by chromatic dispersion. Here, we study the performance of the direct modulation direct detection system using the discrete multi-tone format for repeater-less transmission through up to 150 km of a standard single mode fiber (SMF-28) using the 1550-nm band. The achievable capacity for two different types of directly modulated lasers is studied experimentally and compared with that achievable using chirp-free modulation using a push-pull LiNbO3 Mach-Zehnder external modulator. The benefit of using a larger bandwidth signal is found to diminish as the transmission distance increases. 28 and 25 Gbit/s signal transmission (Bit Error Ratio, BER <; 3.8 × 10-3) over 50 km and 75 km are achieved using just 8-GHz modulation-bandwidth.

Type: Article
Title: Discrete Multitone Format for Repeater-Less Direct-Modulation Direct-Detection Over 150 km
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2016.2555962
Publisher version: http://dx.doi.org/10.1109/JLT.2016.2555962
Language: English
Additional information: Copyright © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works.
Keywords: Discrete multitone, Digital to analog convertor, Direct detection, Directly modulated laser, Modulation, Bandwidth, Radio frequency, Signal resolution, Digital signal processing, Chirp, Optical transmitters
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/1523984
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