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

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 dis...

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Bibliographic Details
Published in:Journal of lightwave technology 2016-07, Vol.34 (13), p.3223-3229
Main Authors: Zhixin Liu, Kelly, Brian, O'Carroll, John, Phelan, Richard, Richardson, David J., Slavik, Radan
Format: Article
Language:English
Subjects:
Bandwidth
Chirp
Digital signal processing
Digital to analog convertor
direct detection
directly modulated laser
discrete multitone
Lasers
Modulation
Optical transmitters
Radio frequency
Signal resolution
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Summary: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 LiNbO 3 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
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2016.2555962