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Capacity constraints for phase noise influenced coherent optical DnPSK systems
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Jacobsen, Gunnar, Popov, Sergei, Xu, Tianhua and Sergeyev, Sergey (2014) Capacity constraints for phase noise influenced coherent optical DnPSK systems. In: 35th PIERS Progress In Electromagnetics Research Symposium , Guangzhou, China, 25-28 Aug 2014
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Official URL: http://www.piers.org/piers2014Guangzhou/
Abstract
We present a comparative study of the influence of dispersion induced phase noise for n-level PSK systems. From the analysis, we conclude that the phase noise influence for classical homodyne/heterodyne PSK systems is entirely determined by the modulation complexity (expressed in terms of constellation diagram) and the analogue demodulation format. On the other hand, the use of digital signal processing (DSP) in homodyne/intradyne systems renders a
¯ber length dependence originating from the generation of equalization enhanced phase noise. For future high capacity systems, high constellations must be used in order to lower the symbol rate to practically manageable speeds, and this fact puts severe requirements to the signal and local oscillator (LO) linewidths. Our results for the bit-error-rate (BER) floor caused by the phase noise influence in the case of QPSK, 16PSK and 64PSK systems outline tolerance limitations for the LO performance: 5 MHz linewidth (at 3-dB level) for 100 Gb/s QPSK; 1 MHz for 400 Gb/s QPSK; 0.1 MHz for 400 Gb/s 16PSK and 1 Tb/s 64PSK systems. Using our analysis, we also consider some design constrains for the phase noise impact in distributed-feed-back (DFB) or distributed-Bragg-re°ector (DBR) semiconductor lasers, that would allow moving the system capacity from 100 Gb/s system capacity to 400 Gb/s in 3 years (1 Tb/s in 5 years).
Item Type: | Conference Item (Paper) | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Official Date: | 2014 | ||||||
Dates: |
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Status: | Peer Reviewed | ||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||
Conference Paper Type: | Paper | ||||||
Title of Event: | 35th PIERS Progress In Electromagnetics Research Symposium | ||||||
Type of Event: | Other | ||||||
Location of Event: | Guangzhou, China | ||||||
Date(s) of Event: | 25-28 Aug 2014 |
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