How to Increase the Achievable Information Rate by Per-Channel Dispersion Compensation
Artikel i vetenskaplig tidskrift, 2019

Deploying periodic inline chromatic dispersion compensation enables reducing the complexity of the digital back propagation (DBP) algorithm. However, compared with nondispersion-managed (NDM) links, dispersion-managed (DM) ones suffer a stronger cross-phase modulation (XPM). Utilizing per-channel dispersion-managed (CDM) links (e.g., using fiber Bragg grating) allows for a complexity reduction of DBP, while abating XPM compared to DM links. In this paper, we show for the first time that CDM links enable also a more effective XPM compensation compared to NDM ones, allowing a higher achievable information rate (AIR). This is explained by resorting to the frequency-resolved logarithmic perturbation model and showing that per-channel dispersion compensation increases the frequency correlation of the distortions induced by XPM over the channel bandwidth, making them more similar to a conventional phase noise. We compare the performance (in terms of the AIR) of a DM, an NDM, and a CDM link, considering two types of mismatched receivers: one neglects the XPM phase distortion and the other compensates for it. With the former, the CDM link is inferior to the NDM one due to an increased in-band signal--noise interaction. However, with the latter, a higher AIR is obtained with the CDM link than with the NDM one owing to a higher XPM frequency correlation. The DM link has the lowest AIR for both receivers because of a stronger XPM.

XPM mitigation

Achievable information rate

per-channel dispersion compensation

fiber Bragg grating

optical communication


Kamran Keykhosravi

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Marco Secondini

Scuola Superiore Sant'Anna (SSSUP)

Giuseppe Durisi

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Erik Agrell

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Journal of Lightwave Technology

0733-8724 (ISSN)

Vol. 37 10 2443-2451 18617150

Signalformning i optisk datatransmission – bortom gausskanalen

Vetenskapsrådet (VR), 2018-01-01 -- 2021-12-31.

Fiberoptisk interferens är inte brus

Vetenskapsrådet (VR), 2014-01-01 -- 2017-12-31.


Informations- och kommunikationsteknik



Atom- och molekylfysik och optik

Den kondenserade materiens fysik


C3SE (Chalmers Centre for Computational Science and Engineering)



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